1 20 25 https://www.geosciencecollections.milne-library.org/files/original/7692356dafeef9106797fc2a6441a736.pdf 0cc3b1da66719d7718e950a8f59d630a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Document A resource containing textual data. Note that facsimiles or images of texts are still of the genre text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Adirondack Highlands, New York Western Minerals Supplementary Materials Description An account of the resource OCR PDF of supplemental information for the Anorthosite-Charnockite Metamorphic Suite-Adirondack Mountains, New York collection. Creator An entity primarily responsible for making the resource Western Minerals Inc. Publisher An entity responsible for making the resource available Western Minerals Inc. Has Format A related resource that is substantially the same as the pre-existing described resource, but in another format. PDF Identifier An unambiguous reference to the resource within a given context AD suite Spatial Coverage Spatial characteristics of the resource. Adirondack Mountains, New York Temporal Coverage Temporal characteristics of the resource. Precambrian Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/c0351119e3ab69be5ce85af0cb4ec060.JPG 4af0c2e47e388cdfd33d41651e2531f4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxene-quartz-plagioclase gneiss https://www.geosciencecollections.milne-library.org/files/original/4fe623be2c157ddd0340c6be827e2539.jpg 5c5e48d65712e95a15e68319c40dff1d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxene-quartz-plagioclase gneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/35e3dd310bd3c3e899e40cf3c959c572.jpg a7121d94bd497383f4df13384e6dfa4b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Pyroxene-quartz-plagioclase gneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Royal Mountain Member, Green Lake Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-3 Title A name given to the resource Pyroxene-quartz-plagioclase gneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a large road cut on the east side of NY routes 10 &29A across from the Canada Lake Store. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen consists of 50-60% andesine, 20-30% quartz, and minor pyroxene and hornblende. Associated with this lithology are 2-6 inch layers of pyroxene-plagioclase granulite and amphibolite. It is believed that the Royal Mountain Member gneiss represents a metamorphosed layered instrusion of overall tonalitic composition. Numerous internal features, such as xenoliths and possible slump structures, support this hypothesis. Thin section shows plagioclase, quartz and hornblende. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/f0a410205c1ce8222501a42321cf5f20.JPG 8306991b18c34a3331fef8053691bfe2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Megacrystic potassium feldspar gneiss https://www.geosciencecollections.milne-library.org/files/original/aaf45459ee05d301a5804980895c57ea.jpg 48903f3c3a5d638d464a4378adda2f11 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Megacrystic potassium feldspar gneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/ed8c33af120ac5561d52280a3d0ee813.jpg 281df6a3807efc854e8f8f7b1524281c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Megacrystic potassium feldspar gneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Rooster Hill Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-5 Title A name given to the resource Megacrystic potassium feldspar gneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a road cut 2.25 miles north of Hamilton-Fulton counties line at sharp curve on NY Route 10, approximately 5.5 miles north of Junction wjth Route 29A. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This lithology is characterized by 1-4 inch long megacrysts of microperthite in a groundmass of quartz, oligoclase, hornblende, orthopyroxene, garnet, and oxide. Although the contacts of this unit are everywhere conformable, the rock is believed to represent a metamorphosed igneous plutonic rock. Similar lithologies are present at other stratigraphic horizons in the Adirondacks. In the Northwest Adirondack Lowlands, Buddington referred to a similar lithology as the Hermon Granite Gneiss. The present samples would be more appropriately referred to as metamorphosed quartz-monzonites. Sporadic occurrences of orthopyroxene indicate that, locally at least, the lithologies are charnockitic. Thin section shows plagioclase, quartz, hornblende and orthopyroxene. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/2adcac723fdc1268058a3702a7877a3c.JPG 4c0edaae61c5bbcf0e6e67426e4085f3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Orthopyroxene gabbro https://www.geosciencecollections.milne-library.org/files/original/f3abdd9d166ce384fc43f1973d147efc.jpg 12d97b0385dbbda29c92729b9b3f5e45 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Orthopyroxene gabbro-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/12ee63623fcc09d5a5bfee4c67c7eff4.jpg b640c6dc08295cb64454a0bb094f4c49 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Orthopyroxene gabbro-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Orthopyroxene gabbro Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Identifier An unambiguous reference to the resource within a given context AD-6 Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a road cut on NY Route 10 approximately 1/2 mile north of Kennels Pond. Temporal Coverage Temporal characteristics of the resource. Precambrian Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen is typical of the saturated gabbros of the Adirondacks. The plagioclases are generally in the range of Anâ‚„â‚€ and the orthopyroxenes average close to Enâ‚†â‚€. Antiperthite is locally developed. Scattered grains of ilmenite and garnet occur. These gabbros may be genetically related to the anorthosites of the region. Thin section shows plagioclase, orthopyroxene and hornblende. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/2bea7419abf55b6c70be5b8551236579.JPG beba72d70c943a9e1cfbfd3061e3f209 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Marble https://www.geosciencecollections.milne-library.org/files/original/146ebb8a0bc09935bd7c9db7343c5763.jpg 3ce5e7b003db7855a622769873ea97cd Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Marble-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/ec6061978803711237eef40f1226bf46.jpg 90949bc30eede2a4b4aff1427b67c495 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Marble-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Blue Mountain Lake Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-7 Title A name given to the resource Marble Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from a large road cut 3.1 miles east of Speculator, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This calcite marble is typical of most Adirondack metacarbonates. In the majority of instances, original dolomite has reacted to yield calcsilicates. Also present in these specimens are small, serpentinized droplets which may originally have been diopside or forsterite. Remnant grains of each of these minerals have been found in the marble. Accessory minerals are graphite, tourmaline, sphene, and sulfides. Adirondack marbles rarely occur by themselves. Rather, they tend to be interlayered with garnetiferous amphibolites similar to AD-10 (but not necessarily of igneous origin) and calcsilicates such as specimens AD-8 and AD-9. Quartzites and metapelitic layers occur with the marbles. Thin section shows dolomite and serpentinized diospide Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/0701f343c92a9d888c6945b14790ce24.JPG 99b931ed0659a972e1c708146127bd8a Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Diopsidite https://www.geosciencecollections.milne-library.org/files/original/f676c00378a8d1da9f9cc8700f6fb8f5.jpg 68c7a6db822174a728f4fdb55d7c4395 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Diopsidite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/0a4cab75d4588e2f76fcf12eae8b9cb1.jpg 4b16ecb02de97dfc1b1ae36400e8f117 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Diopsidite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-9 Title A name given to the resource Diopsidite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from the south end of a road cut approximately 6 miles northeast of Speculator, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Pods and lenses of green diopsidite commonly occur along with the marbles. They are often composed of over 90% diopside. Thin section contains diopside. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/ea78859d9629f376eb6b63aa83c1bc08.JPG 2095bccd33c278c4f7c246c5d81ffd14 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous amphibolite https://www.geosciencecollections.milne-library.org/files/original/a32c1b860e768faf6d320ef063a1f45d.jpg 113acd646dcdd4f22828b1184a515f9f Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous amphibolite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/1330ba6e5fce92814e53bd8285d606b8.jpg 3b67524961bc592cec53832ce7276239 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous amphibolite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-10 Title A name given to the resource Garnetiferous amphibolite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from a road cut 0.9 miles north of Speculator, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New Yorks</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen is similar to the famous garnet deposits at Barton Mines at Gore Mountain. The garnets at Gore Mountain can attain diameters of 3 feet. At the Speculator road cut, garnet of 8-10 inches in diameter have been found, but smaller examples were considered to be best suited for the purposes of this suite. Both at Gore Mountain and Speculator, the original rock can be shown to have been an olivine metagabbro. The present mineralogy consists of garnet, hornblende, and plagioclase with the development of narrow rims of very anorthitic plagioclase (Anâ‚ˆâ‚€) surrounding many of the garnets. In addition, orthopyroxene locally replaces hornblende near the plagioclase rims. The following information is from the original OCR document: The origin of the garnetiferous amphibolites has been discussed by Bartholome, "Genesis of the Gore Mountain Garnet Deposit", 1960, Economic Geology, v. 55, p. 255-277. The rims of calcic plagioclase and associated orthopyroxene has been discussed by deWaard, "The Occurrence of Garnet in the Granulite Facies of the Adirondack Highlands, " 1965, Journal of Petrology, v.6, p. 165-191. DeWaard shows convincingly that these rims are formed during the reaction hornblende + garnet + quartz = orthopyroxene + plagioclase + Hâ‚‚O. Thin section shows plagioclase, hornblende and garnet. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/2ec6b07ab95c75d72406e9d07cb086d7.JPG 679414b2bb44a18076d2a675c1622f09 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two-pyroxene-plagioclase granulite https://www.geosciencecollections.milne-library.org/files/original/7eac3df37bf17d1b88f772b92cf911d6.jpg 6ac7ba0d7c37f54462ad12c115eeea78 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two-pyroxene-plagioclase granulite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/f7f7e25e41116cec953a4a8c5257f5f4.jpg aedd48504dfa16eeb8cc1c92a5fd8210 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two-pyroxene-plagioclase granulite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Sacandaga Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-12 Title A name given to the resource Two-pyroxene-plagioclase granulite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from the west side of a road cut just north of Pumpkin Hollow. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource The Sacandaga Formation consists of a well layered series of dark granulites (AD-12) and leucogneisses (AD-13). Orthopyroxene is generally present in greater quantity than clinopyroxene. It is not known whether these rocks are metasedimentary or metaigneous. They are strongly foliated. Thin section shows plagioclase (one with perthitic texture), orthopyroxene and quartz. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/f3cd5ef6b33efe5d28b3abfda3a9a0e6.JPG 7c83e4888b0e8f2c477071b8934fb365 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartz-microcline-diopsite gneiss https://www.geosciencecollections.milne-library.org/files/original/b4b6f8f6169e40f388c92cebe541cd52.jpg ac3ba9a46bedb0a6fcecada0d79ca8b6 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartz-microcline-diopsite gneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/9c32374032a177b6785525de72afc37c.jpg 6cdccbb01b41d1cd8b1b6cd38594c9b4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartz-microcline-diopsite gneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-15 Title A name given to the resource Quartz-microcline-diopsite gneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from a road cut approximately just west of the parking area along the north shore of Mason Lake (Indian Lake Quadrant). Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1980 Description An account of the resource This specimen displays an unusual and distinctive lithology that occurs primarily in lower, marble-rich units (for example, the Cedar River Formation). Thin section shows quartz, K-feldspar and clinopyroxene. https://www.geosciencecollections.milne-library.org/files/original/fa24a2fe2f70172919a373084ac3aad9.JPG c7865728396a17d1b36ea110ba174924 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous olivine metagabbro https://www.geosciencecollections.milne-library.org/files/original/1656345627e043ab70eb3416d938d095.jpg ac749bd71491acb5353ef7cab1cd89c0 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous olivine metagabbro-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/451dc72c83d549fd303d4fdca20465f2.jpg 2baba133eb37182f0eed41ba9bd52453 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous olivine metagabbro-thin section plane polarized light https://www.geosciencecollections.milne-library.org/files/original/b740885228d58c48c4b88d4a3d8a6698.jpg 1f5221cb51cb8740580ef6617d77c0bf Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous olivine metagabbro-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/39c304157f9da14d8901aa082555790c.jpg 6361cd1f65598cd34c8e9fe23b55daf0 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous olivine metagabbro-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-16 Title A name given to the resource Garnetiferous olivine metagabbro Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 418 from a large road cut (south side), 3 miles west of the junction with highway 7 in Warrensburg, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen is typical of the olivine metagabbros that occur throughout the Adirondacks. These rocks are of great petrologic interest for they contain classic examples of garnet coronas and spinel-clouded plagioclase. Note the preservation of ophitic and sub-ophitic igneous textures even though these rocks have experienced granulite facies conditions. A magnificent example of transition to eclogite facies. The following information is from the original OCR document: Detailed reactions accounting for both metamorphic assemblages and textures are developed in McLelland and Whitney, "A Generalized Garnet-Forming Reaction for Metamorphic Rocks in the Adirondacks," 1980, Contributions to Mineralogy and Petrology, v.72, p. 111-122. Explanations for a number of metamorphic textures in these rocks can be found in McLelland and Whitney, "Compositional Controls On Spinel and Garnet Formation in Plagioclase of Olivine Metagabbros," 1980, Contributions to Mineralogy and Petrology. The first 2 thin sections show a plagioclase lath and a garnet with plagioclase and olivine surrounding it. The second 2 thin sections show a garnet with plagioclase corona and olivine crystals surrounding the garnet. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/b66c829d80ead6b66e239c3a316c2926.JPG 450b1b31931b23de5f700a9f21a29816 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Coarse anorthosite https://www.geosciencecollections.milne-library.org/files/original/d5030aeecf15ad495fbb69a15d86971f.jpg 268eebb1c3e658f797dd95ad167f4aa6 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Coarse anorthosite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/15e33953ad30a1987f8f7847d1853f19.jpg cd8b09a0730af338bc2a09c1c479ea10 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Coarse anorthosite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-18 Title A name given to the resource Coarse anorthosite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a massive outcrop on NY Route 3, about 5 miles south of Saranac Lake. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This coarse-grained specimen is typical of the massive, homogeneous anorthosite that occurs within the Marcy Massif and underlies the High Peaks region of the Adirondacks. The anorthosite from Route 3 is best represented by analyses 5-L and 8, Table 3, Buddington (1939). Also by analyses A, 16, and 17, Table 4, p. 3 , and by Table 5, p. 32, Buddington (1939). Thin section shows plagioclase, clinopyroxene and ilmenite. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/182aaf714d4454c8b825a2d627f36670.JPG 5fe5fe345302c85818440bd4b27c372e Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartzite https://www.geosciencecollections.milne-library.org/files/original/26d2717ac8902747f023cda5878f3450.jpg 153c82ea41ba2026f1589ec123f80da1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartzite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/95cc536e821ed6b1c0128320c0cb69a7.jpg 6dd4dd22771e9d7ecd68b2c1e24123dc Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Quartzite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Irving Pond Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-1 Title A name given to the resource Quartzite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a road cut on NY Routes 10 & 29A, Â½ mile north of the Nick Stoner Inn and 1Â¼ miles south of the Canada Lake Store. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen is typical of the 5-10 foot thick coarse grained layers of glassy quartzites that comprise this formation. In most instances the quartzites are about 90% quartz. Feldspar and garnet are encountered locally. This is presumed to be the uppermost stratigraphic unit in the Adirondacks and typical of Adirondack quartzite generally. Thin section shows primarily quartz with a minor amount of feldspar. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/55e24ebab872a9e09283742a53d8c03f.JPG 8c151af8bcc5f2c03412639fe766076f Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Charnockite https://www.geosciencecollections.milne-library.org/files/original/e23a0f2ee6cbd5f8107dc8611fe27fb8.jpg 93776188d4b2a3f7e3bfecaa0ed51ffe Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Charnockite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/a68a9a4111f881e7a490c24e89eba9bb.jpg cd53ef059867d23cd408b3cd14c4e681 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Charnockite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-2 Title A name given to the resource Charnockite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands- collected on Routes 10 & 29A , 0.7 miles south of the Canada Lake Store and 0.8 miles north of the Nick Stoners Inn. Collected from the west side of a large roadcut at crest of hill (where McLelland found evidence of some orthopyroxene). Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This charnockite is similiar to most of the Adirondack charnockites that occur interlayered with other metastratified units. Like its analogues, the Canada Lake charnockite shows conformable realationships with enveloping units. Mineralogically, these charnockites consist of 50-60% gray-green mesoperthite, 20-30% quartz, 5-10% sodic plagioclase, and minor amounts of biotite, hornblende and orthopyroxene. The latter mineral is only sporadically in any outcrop. It is not known whether these rocks represent metasediments, metaplutonics, or metavolcanics. The latter possibility is favored by field relationships and homogeneity. Thin section shows K-feldspar, quartz and plagioclase. https://www.geosciencecollections.milne-library.org/files/original/975e3474b7fcc69629b48494a3942c66.JPG e256f75e8bc2574d71742a52b907bfb1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-biotite-quartz-plagioclase gneiss https://www.geosciencecollections.milne-library.org/files/original/92462fb0b10d95d4224f32d3ebf511ce.jpg f59cec60a3f59e0a51bb61009e91851b Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-biotite-quartz-plagioclase gneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/8ff277adfa9d3e81f8c81ee1ff9bbf93.jpg 0bdf12838fbc16b6aa91bc4db62a903c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-biotite-quartz-plagioclase gneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Peck Lake Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-4 Title A name given to the resource Sillimanite-garnet-biotite-quartz-plagioclase gneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands--collected form a road cut on Route 29A approximately 5 miles north of Canada Lake Store, directly across from the Canada Lake Rod and Gun Club entrance. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <div style="text-align:left;"><a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a></div> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource The predominant lithology of the Peck Lake Formation is a sillimanite-garnet-biotite-quartz-oligoclase gneiss with pods and lenses consisting of two feldspars and quartz (anatectic?). The lithology is widespread throughout the Adirondacks and may represent a metapelite or metagraywacke. European geologists have referred to similiar lithologies as "kinzigites" (deWaard, 1962). Thin section shows sillimanite, quartz, biotite and plagioclase. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/b8e4138e6db0ca0f338f42bb2f91f94c.JPG 8b7f40dc0f1f976ed85da5a8729da31f Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Calcsilicate rock https://www.geosciencecollections.milne-library.org/files/original/8898d31bd9ef5490042db875c1138ec9.jpg 02f38a193466a7ae99f3b02a27b5c01c Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Calcsilicate rock-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/defb40c994d37c081c446a5cd9b7bbcb.jpg 1bbe8ef3d45143f9a5eed15104371787 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Calcsilicate rock-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Blue Mountain Lake Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Calcsilicate rock Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metmorphic Suite-Adirondack Mountains, New York</a> Identifier An unambiguous reference to the resource within a given context AD-8 Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from a large road cut 3.1 miles east of Speculator, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource Minerals found in the calcsilicate facies contain quartz, diopside, enstatitic pyroxene, tremolite, calcite, and phlogopite. However, only a few thin sections have been found to contain all phases. In some specimens, the pyroxene is close to 100% enstatite. The assemblage may be due to the reaction tremolite=diopside+ enstatite + quartz +fluid. This reaction discussed by Boyd, "Hydrothermal Investigations of Amphiboles," in Abelson, p.377-396. Thin section shows calcite, diopside and phlogopite. https://www.geosciencecollections.milne-library.org/files/original/a30dcc469cdcc020252c7aa2b9df65c9.JPG 3c1dc09223fd7a101f240889b111c4a2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-quartz-feldspar gneiss https://www.geosciencecollections.milne-library.org/files/original/5283f807017d0289165f0865f8d94c2e.jpg 071248a12c27844c91f3e4663c918f69 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-quartz-feldspar gneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/492f9d61fa2d16952a2c234b8f381f8c.jpg 142493eb88b035ef39ea4fa6d9987677 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Sillimanite-garnet-quartz-feldspar gneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-11 Title A name given to the resource Sillimanite-garnet-quartz-feldspar gneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 8 from a small road cut at the hilltop east of Graphite, NY and approximately 3 miles west of Hague, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This specimen is extremely rich in sillimanite. European geologists refer to such lithologies as "khondolites." This locality is very near some of the old graphite production sites west of Hague. Thin section shows sillimanite, garnet, k-feldspar. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/606d3ee95d54b6d9400d23acbc554df9.JPG ee895595b6266a270c4fa3fe00f6da17 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous leucogneiss https://www.geosciencecollections.milne-library.org/files/original/13b5d867e8476724c5869fd965d53707.jpg 10bc39ba047c032918a8f4453e99c863 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous leucogneiss-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/c6c013820d0a9deb83d80153a0118bcf.jpg af61f0611c6348d8ef963629b0f3f566 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Garnetiferous leucogneiss-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Sacandaga Formation Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-13 Title A name given to the resource Garnetiferous leucogneiss Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected on NY Route 30 from the west side of a road cut just north of Pumpkin Hollow, 100 yards south of sample AD-12. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1980 Description An account of the resource This rock type is characteristic of the light colored layers in the Sacandaga Formation. The mineralogy consists of garnet, feldspar, and quartz. Occasionally, sillimanite and skeletal oxides occur. Both plagioclase and microcline are present. Quartz modes occur as high as 40-50%. Thin section shows quartz, plagioclase and garnet. https://www.geosciencecollections.milne-library.org/files/original/699794817e56ab3f3c933b9877efe45a.JPG 14a78a13570d6c0227f565a751073ce3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Tennantville gabbroic anorthosite https://www.geosciencecollections.milne-library.org/files/original/bfe40e12d218f4651d820d3acd9b1410.jpg ded5cc862150ac50772d4b356e657da5 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Tennantville gabbroic anorthosite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/42bcc080d1c9372d77c2a45ce75fd398.jpg 2f74f27a69ccf7b94b2c1a9f3bc79e3f Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Tennantville gabbroic anorthosite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-14 Title A name given to the resource Tennantville gabbroic anorthosite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a low road cut on Military Road at the north edge of the Edinburg Quadrant. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource This medium grained facies is one of a number of anorthositic sheets that intrude throughout the stratigraphic section of the southern Adirondacks. A chemical analyses of specimens from this outcrop yield results that are almost identical with Buddington's (1939) average gabbroic anorthosite. <table><tbody><tr><td> Â </td> <td> Tennantville locality (McFarland) </td> <td> Average Gabbroic Anorthosite (Buddington) </td> </tr><tr><td> SiOâ‚‚ </td> <td> 52.36 </td> <td> 52.37 </td> </tr><tr><td> TiOâ‚‚ </td> <td> 1.14 </td> <td> - </td> </tr><tr><td> Alâ‚‚Oâ‚ƒ </td> <td> 23.75 </td> <td> 24.68 </td> </tr><tr><td> Feâ‚‚Oâ‚ƒ </td> <td> 1.11 </td> <td> 1.24 </td> </tr><tr><td> FeO </td> <td> 3.96 </td> <td> 3.49 </td> </tr><tr><td> MnO </td> <td> .07 </td> <td> - </td> </tr><tr><td> MgO </td> <td> 1.53 </td> <td> 2.0 </td> </tr><tr><td> CaO </td> <td> 10.63 </td> <td> 10.57 </td> </tr><tr><td> Naâ‚‚O </td> <td> 3.69 </td> <td> 4.02 </td> </tr><tr><td> Kâ‚‚O </td> <td> .90 </td> <td> .86 </td> </tr><tr><td> Pâ‚‚Oâ‚… </td> <td> .16 </td> <td> - </td> </tr><tr><td> Hâ‚‚O+ </td> <td> .69 </td> <td> .90 </td> </tr><tr><td> Total </td> <td> 99.99% </td> <td> 100.13% </td> </tr></tbody></table> The existence of these instrusive sheets of gabbroic anorthosite argues strongly against the proposition that the anorthositic rocks constitute part of an older, pre-Grenvillian basement complex. Rocks similar to the Tennantville gabbroic anorthosite commonly occur as border facies surrounding larger, coarser bodies of anorthosite. Spongy, brick-red garnets are common in these rocks. Thin section shows plagioclase and clinopyroxene. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/a746f5171b47d4307394a1322744582d.JPG f3d98194aa1177666b240412cea810ac Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Anorthosite https://www.geosciencecollections.milne-library.org/files/original/2da066291265231b666ea1f90623223c.jpg d58ec77ed16d1d8600730744a89640b1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Anorthosite-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/15f2015abf31d098b4dcd803b0a051ad.jpg 97c32e8f4bbc10919d3085368675ab03 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Anorthosite-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Oregon Dome Massif Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-17 Title A name given to the resource Anorthosite Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from a road cut on NY Route 30, 1/2 mile south of junction old route 30 and about 2 miles north of junction NY Route 8. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Description An account of the resource The specimen was collected from the Oregon Dome Massif. The Oregon Dome is similar in all respects to the anorthosites described and analyzed by Buddington (1939) for the Adirondack High Peaks region (Marcy Massif). Texturally, the present specimens are partly granulated and are fairly typical of Adirondack anorthosites situated near the margins of the massifs. Of particular interest in this specimen is the occurrence of garnet. In general, this rims both oxides, usually ilmenite and clinopyroxene (and sometimes cored by orthopyroxene). The assemblage is typical of garnet-clinopyroxene subfacies of the granulite (deWaard, 1965). The following information is from the original OCR document: The reactions producing this assemblage have been discussed by McLelland and Whitney, "Origin of Garnet in the Anorthosite-Charnockite Suite of the Adirondacks" 1977, Contributions to Mineralogy and Petrology, v. 60, p.161-181. Thin section shows plagioclase and orthopyroxene. Date A point or period of time associated with an event in the lifecycle of the resource 1980 https://www.geosciencecollections.milne-library.org/files/original/03cda701b66f2dfc367ec01c10943bea.JPG 98a731a14fbc3aafbe3400040394b1b3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two Pyroxene-spinel metagabbro https://www.geosciencecollections.milne-library.org/files/original/5ff49686be73c1eaf1376b8661c8ea5b.JPG b670fee5ae90a7a09686159f3564f842 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two Pyroxene-spinel metagabbro https://www.geosciencecollections.milne-library.org/files/original/f370ffb98aac7ae376307f2ba32359d0.jpg aaf77c16cc14ef30e3e7ca47556cfea3 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two Pyroxene-spinel metagabbro-thin section cross polarized light https://www.geosciencecollections.milne-library.org/files/original/f8441ffc2737cb8d6edb6226d4acd033.jpg d0df95a566b822bedc5958e34b060914 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Two Pyroxene-spinel metagabbro-thin section plane polarized light Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource (ADK) Anorthosite-Charnockite and Metamorphic Suite -- Adirondack Mountains, New York Description An account of the resource The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks. This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area. Contributor An entity responsible for making contributions to the resource Western Minerals Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here:Â McLelland, J., and Selleck, B.W.,2011,Â Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi:Â <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>. <ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li> </ul>Additional resources: McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004,Â Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes:Â Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi:Â <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>. <ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifsÂ constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</li> </ul>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks inÂ New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York <ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li> </ul>McLelland, J., Daly, J.S., and McLelland, J.M., 1996,Â The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>. <ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li> </ul>McLelland, J., Lewis, A., and Moore, L., 1994,Â Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi:Â <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>. <ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li> </ul>New York State Geological Survey <a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html </a> <ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li> </ul>Regan, S.P., Chiarenzelli, J.R., McLelland,Â J.M., and Cousens, B. L., 2011,Â Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.Â 694-709, doi:Â <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>. <ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li> </ul> Date A point or period of time associated with an event in the lifecycle of the resource 1980 Temporal Coverage Temporal characteristics of the resource. The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era). Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Spatial Coverage Spatial characteristics of the resource. This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State. Rock A physical material with a mineral composition. Number of Thin Sections Number of thin sections associated with this sample 1 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context AD-19 Title A name given to the resource Two Pyroxene-spinel metagabbro Spatial Coverage Spatial characteristics of the resource. Adirondack Highlands-collected from the first high hill just southwest of the intersection of NY Route 30 and Benson Rd., approximately 2 miles northwest of Northville, NY. Temporal Coverage Temporal characteristics of the resource. Precambrian Contributor An entity responsible for making contributions to the resource Western Minerals Inc. Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountns, New York</a> Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1980 Description An account of the resource The locality near Northville, NY represents the only example of this assemblage that has been encountered to date (1980) in the Adirondacks. The original lithology is that of a typical olivine metagabbro. During granulite facies metamorphism, reactions produced coronas consisting of orthopyroxene rims on olivine and spinel-clinopyroxene symplectites. Amphibole-spinel coronas also occur. These assemblages appear to represent lower pressure conditions than prevailed during the formation of the garnet-bearing assemblages represented by AD-16. The following information is from the original OCR document: The mineralogy and textural features of these metagabbros are discussed in McLelland and Whitney, 1980, Contributions to Mineralogy and Petrology, v.72, p.111, specimen 17 and Whitney and McLelland, "Origin of Coronas in Olivine Metagabbros of the Adirondack Mountains, NY," 1973, Contributions to Mineralogy and Petrology, v. 39, p.81-98. The specimen you receive may be somewhat smaller than the regular specimens. Dr. James McLelland collected this material especially for this suite-and in 100Â° temperature. Thank you, Jim. Thin section shows augite, spinel and plagioclase.