80 20 1651 https://www.geosciencecollections.milne-library.org/files/original/594db1386a179c05d29cc9bb64187733.JPG c65e05a2530c0798bd961be76bbf646d Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 1936 Height 2592 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/372c2e3e7e4eb57fddb14de28d5102ff.JPG 88bbe3c580b3d10238c8d753fc4f2fab Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/616e043bae92f9331a74e755fb0e09d8.JPG 096eeceb5ca59e46960e6322a9f4d93d Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource Samples KBR-1, KBR-2, and KBR-2A are from a vertical mass of gabbro showing progressive differentiation inward. This sample is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a red rusty looking weathered surface. This rock has an average specific gravity. Thin section images are shown in plain and cross polarized light at40x magnification. The gabbro is composed of 65% plagioclase, 30% pyroxene, 3% oIivine, and 2% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-1 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/54aaaaa5d93ffd48096e3d52c0e9f9de.JPG bdcb8e87929b12e04b4acbaac8ed1744 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 3456 Height 4608 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/1fdccb705f8af3e039ea5f81f8f5014a.JPG 13d143a716e32086543749e288a0e07d Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/5c6103ad7366a42e63e567eda387277f.JPG 3613fe74659fd9d5827c3c468beb7d13 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource Samples KBR-1, KBR-2, and KBR-2A are from a vertical mass of gabbro showing progressive differentiation inward. This sample is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a red rusty looking weathered surface. This rock has an average specific gravity. Thin sections are shown in plain and cross polarized light at 40x magnification. The gabbro is composed of 70% plagioclase, 30% pyroxene (mainly augite), and <1% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-2 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/53de696fc70c67562abd0814b18666e9.JPG c965a5f1b707d05ad2abb38c3568b50a Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 3456 Height 4608 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho Formation 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource Samples KBR-1, KBR-2, KBR-2A are from a vertical mass of gabbro showing progressive differentiation inward.This sample is the second sample for KBR-2. This sample is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a red rusty looking weathered surface. This rock has an average specific gravity. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-2A Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/47f6506a7e25b0850c541fc949e32eab.JPG 9a6289233fc47677c8f35ebec9843fbd Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 1936 Height 2592 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/427dd712f0286ee8c2897550335ca2d5.JPG ffc790a8bc4b2567a1ccd6c88c001f9f Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/90f39c4db092c1cf22d4616434a5023f.JPG 5db7cac2a3ac414bb03c4119e94e7b54 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource KBR-3 through KBR-6 are a second gabbro mass, distinguished from the first by a repetition of the differentiation cycle. The gabbro is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm.There is a red rusty looking weathered surface. The rock has an average specific gravity. Thin sections are shown in plain and cross polarized light at 40x magnification. The rock is made up of 65% plagioclase, 34% pyroxene (mainly augite), and <2% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-3 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/b76ab358a716058c267584c13ba84892.JPG 979d8b8fc7744ca9a0b81053cd22fe49 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 1936 Height 2592 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/f7011a53583995395f920e596965f48a.JPG ac87589eb5c0dead4989f3162c4d54e3 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/afa1ce0364d1a99c5af2c0e48e758f99.JPG fdf3cdf810367cd549308e98a3096c2d Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho Formation Number of Thin Sections Number of thin sections associated with this sample 2 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource KBR-3 through KBR-6 are a second gabbro mass, distinguished from the first by a repetition of the differentiation cycle. The gabbro is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a red rusty looking weathered surface. This rock has an average specific gravity. Thin sections shown in plain and cross polarized light at 40x magnification. The rock is made up of 65% plagioclase, 25% pyroxene (mainly augite), and 10% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-4 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/ff5e779af6607cae0030796f4af91657.JPG 93980b64e7e1b421722bd31540c80b69 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 1936 Height 2592 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/4f50602cd8719422015d7c01cfe283e8.JPG b656317698f776841c50b1503f978601 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/0f2b5470b3f43d3438000af0a6e618ad.JPG 9bd6150bfb3725e7f46346ca474f2a99 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho Formation Number of Thin Sections Number of thin sections associated with this sample 2 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource KBR-3 through KBR-6 are a second gabbro mass, distinguished from the first by a repetition of the differentiation cycle. The gabbro is medium grained and holocrystalline with a hypidiomorphic-granular texture. There are gray and black crystals, both ranging from <1mm- 3mm. There is a reddish, rusty looking weathered surface. This rock has an average specific gravity. Thin sections shown in plain and cross polarized light at 40x magnification.The rock is made up of 80% plagioclase, 20% pyroxene (mainly augite), and ~2% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-5 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/f050167c18397ffe194153c479a99498.JPG 61b89f6d2dd8c06e5865b8ce733f4efd Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 1936 Height 2592 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/45a98d21c15aa687538e6160c38dfc34.JPG b99b5b6d76d7940e863ade7580c84afa Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/3b56386d374a988b8cae5ce5c1850276.JPG b2e94952e493e2954510c35ee1b3f983 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2560 Height 1920 Bit Depth 8 Channels 3 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 (KBR) Karroo Igneous Complex -- Birds River, South Africa Description An account of the resource The Birds River Complex is a "Bell-Jar" intrusion first described by du Toit in 1905 and then by Ealey and Robey in 1976. One of the best exposed sections across the margin of the complex is on the farm Denwood, in the southwestern corner of the complex. The samples were collected from a mafic intrusion near Denwood farm. These samples from the Karroo Complex were collected from the previously studied section of the complex and neighboring areas. Contributor An entity responsible for making contributions to the resource Dr. Brian Lock, Rhodes University Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start Here: Cox, K.G., 1972, The Karroo Volcanic Cycle: Journal of the Geological Society, v. 128, p. 311-336.Â doi: 10.1144/gsjgs. 128.4.0311. <ul><li>The petrogenesis of the Mesozoic igneous rocks of south-Eastern Africa is related to the tectonic event believed to be the initiation of the break up of Gondwanaland. The cycle began with the rise of potassium-rich picritic magma, the source material for rocks of the northern province, Rhodesia. On top of and peripheral to the main magma body, a zone of sodic magma was generated and formed some of the rocks of the north and most southern rocks.</li> </ul> Additional resources: White, R.S., 1992, Magmatism During and After Continental Break-Up, Geological Society, London, Special Publications, v. 68, p. 1-16. doi:Â 10.1144/GSL.SP.1992.068.01.0. <ul><li>Magmatism that goes along with continental break-up is caused primarily by decompression melting of the underlying mantle as it rises up beneath the rift. The amount of melt produced is determined by the asthenospheric mantle temperature and on the rate of rifting.Â </li> </ul>Eales, H.V., and van Robey, J.A., 1976, Differentiation of Tholeiitic Karroo Magma at Birds River, South Africa, Contributions to Mineralogy and Petrology 10. v. 56, p. 101-117. doi:Â 10.1007/BF00375423 <ul><li>Strongly fractionated residue from the partial crystallization of tholeiitic gabbroic magma was emplaced at depth within sediment of the upper part of the Karroo succession. The residue was most likely tapped from a deeper intrusion during cauldron subsidence, but was engulfed by a later intrusion of olivine gabbro on a large scale.</li> </ul> Walker, F., and Poldervaart, A., 1949, Karroo Dolerites of the Union of South Africa, Geological Society of America Bulletin, v. 60, p. 591-706. doi: 10.1130/0016-7606(1949)60[591:KDOTUO]2.0.CO;2 <ul><li>The Karroo dolerites are the result of the intrusive phase of the early Jurassic basalts that built up the Basutoland lava plateau. Most of the dolerites show little differentiation but olivine rich types and acidic veins have been recorded. The magma had an effect on the sedimentary rocks; many of the rocks described as granophyre were found to be transformed siltstone. The dolerites occur as sills and dikes but "bell-jar inclusions" occur (the Bird's River complex is a bell jar shaped inclusion).Â </li> </ul> Eales, H.V., and Booth P.W.K., 1974, The Birds River Gabbro Complex, Dordrecht District, Transactions of the Geological Society of South Africa, v. 77, p. 1-15. <ul><li>On the gabbros of the Birds River Complex.</li> </ul> Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Lesotho Formation Number of Thin Sections Number of thin sections associated with this sample 2 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 Tholeiitic Gabbro Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Gabbro Description An account of the resource KBR-3 through KBR-6 are a second gabbro mass, distinguished from the first by a repetition of the differentiation cycle. Between the location this sample was collected and the location KBR-7 was collected there is a thin gabbro pegmatite that was uncollected. This sample is medium grained and holocrystalline with a hypidiomorphic-granular texture.There are gray and black crystals, both about ranging from <1mm- 3mm. There is a reddish, rusty looking weathered surface. This rock has an average specific gravity. Thin sections shown in plain and cross polarized light at 40x magnification. The rock is made up of 65% plagioclase, 35% pyroxene, (mainly augite), and 3% opaques. Date A point or period of time associated with an event in the lifecycle of the resource No date given. 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. http://www.geosciencecollections.milne-library.org/collections/show/17 Identifier An unambiguous reference to the resource within a given context KBR-6 Spatial Coverage Spatial characteristics of the resource. Karoo- Birds River, Eastern Cape, South Africa Temporal Coverage Temporal characteristics of the resource. 183-179 Ma (Jurassic) Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc https://www.geosciencecollections.milne-library.org/files/original/301c2dfcd41eb2f37926de60f5f0420e.JPG 2d6f11c7325a2ef0d1d51ce583f8582c 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 Hand Sample https://www.geosciencecollections.milne-library.org/files/original/79b84e5fc0a9208aad8ca0914b1b5e33.jpg f71df115c17821911fc050f2e7051e9f 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 100x Magnification https://www.geosciencecollections.milne-library.org/files/original/2f2137cedf2bbb3d7296a550e40cc965.jpg f28c4a1b1b5086e1c49512224c2885ad 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 40x Magnification 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 (HA) Volcanic Phenomena Suite -- The Hawaiian Islands of Hawaii and Oahu Description An account of the resource These 31 samples comprise a collection of volcanic rocks associated with the hot-spot volcanism of the Hawaiian Islands. Samples were collected from various locations across the islands of Hawaii and Oahu. The collection contains samples of primarily tholeiitic & alkalic basalts, pumice, scoria, oceanite, and hawaiite. Contributor An entity responsible for making contributions to the resource Western Minerals, Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1969 Identifier An unambiguous reference to the resource within a given context HA-1 - HA-31 Spatial Coverage Spatial characteristics of the resource. Samples were collected from various locations on the islands of Hawaii and Oahu. Temporal Coverage Temporal characteristics of the resource. Samples formed from Holocene eruptions of the past 300 years. Dated samples formed between 1750 and 1960. Accrual Method The method by which items are added to a collection. Purchased from Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here: Macdonald, G.A., 1949, Petrography of the Island of Hawaii, U.S.G.S. Prof. Paper 214 D <ul><li>This article is a part of the general investigation of the island of Hawaii by the United States Geologic Survey. The paper describes the dominant volcanoes of the island of Hawaii (from which most of the suite's samples were collected) and describes the petrographic phenomena observed and geochemical analyses of volcanic rocks.Â </li> </ul>Additional Resources: Ho, R.A., Garcia, M.O., 1988, Origin of differentiated lavas at Kilauea Volcano, Hawaii; implications from the 1955 eruption: Bulletin of Volcanology, v. 50, p. 35-46. <ul><li>This article describes a study of lava flows from the 1955 eruption of the Kilauea Volcano on the island of Hawaii to evaluate models of crystal fractionation or magma mixing as the processes forming differentiated magmas. Through geochemical analyses, the study concluded that crystal fractionation resulted in the observed differentiation of lavas.</li> </ul> Hofman, A.W., Farnetani, C.G., 2013, Two Views of Hawaiian Plume Structure: Geochemistry, Geophysics, Geosystems, v.14, p. 5308-5322, doi:10.1002/2013GC004942 <ul><li>This article presents two opposing views of the source of magmas for the Hawaiian volcanoes. Both views favor a deep mantle source, but try to explain differences in isotopic compositions.</li> </ul> Macdonald, G.A., 1968, Composition and origin of Hawaiian LavasÂ in GSA Memoirs 1968, p. 477-522 <ul><li>This article provides geochemical analysis of major elements as well as determinations of minor elements of volcanic rocks from the island of Hawaii. The article describes the three major rock types - tholeitic, alkalic, and nephelinic - and concludes these rock suites are chemically intergradational and are likely derived from crystal differentiation of a single parent magma.</li> </ul> Moore, J.G., Clague, D.A., 1992, Volcano growth and evolution of the Island of Hawaii: Geologic Society of America Bulletin, v. 104, p. 1471-1484 <ul><li>This article proposes a chronologic evolution of the island of Hawaii, from where many of the suite's samples were collected.</li> </ul> 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 Tholeiitic Olivine Basalt Description An account of the resource Hand Sample: Aphanitic medium gray vesicular basalt with scattered olivine crystals. Olivine crystals are scattered throughout the sample and are either growing in clusters or as single crystals. Olivine crystals range in size from 0.05cm to 0.5cm in diameter. Vesicles are common in sample and range in diameter from 0.05cm to 2cm. Thin Section: Aphanitic groundmass of plagioclase, interstitial glass, and microcrystals of clinopyroxene. Phenocrysts of olivine and pyroxenes are present in the picture. Vesicles are large but not as numerous as phenocrysts. Contributor An entity responsible for making contributions to the resource Western Minerals Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/collections/show/656">Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu</a> Identifier An unambiguous reference to the resource within a given context HA-7 Spatial Coverage Spatial characteristics of the resource. Kiluea Volcano - Island of Hawaii Temporal Coverage Temporal characteristics of the resource. Feb. 12, 1960 Date A point or period of time associated with an event in the lifecycle of the resource Sample collected January, 1969 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 Maps Still Image A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials. Physical Dimensions The actual physical size of the original image. 0/1 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 174 Title A name given to the resource Thousand Springs, Idaho Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Thousand Springs, ID Quadrangle Creator An entity primarily responsible for making the resource US Geological Survey Date Created Date of creation of the resource. 1949 Source A related resource from which the described resource is derived MAP144A-4 Publisher An entity responsible for making the resource available US Geological Survey Subject The topic of the resource Topography Spatial Coverage Spatial characteristics of the resource. Snake River, Idaho, United States Description An account of the resource 1:24000 Extent The size or duration of the resource. 1 Has Version A related resource that is a version, edition, or adaptation of the described resource. <a href="https://www.sciencebase.gov/catalog/item/58922ddfe4b072a7ac13c1d0" target="_blank">Digital Map Link</a> Relation A related resource Buhl, Clover, Niagra Springs, Tuttle, Hagerman Is Part Of A related resource in which the described resource is physically or logically included. "One Hundred Topograhpic Maps Illustrating Specific Physiographic Features" 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 ISC 144 Map Drawers Still Image A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials. Physical Dimensions The actual physical size of the original image. 0/1 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 174 Title A name given to the resource Thousand Springs, Idaho Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Thousand Springs, ID Quadrangle Creator An entity primarily responsible for making the resource US Geological Survey Date A point or period of time associated with an event in the lifecycle of the resource 1949 Source A related resource from which the described resource is derived MAP144A-4 Publisher An entity responsible for making the resource available US Geological Survey Subject The topic of the resource Topography Spatial Coverage Spatial characteristics of the resource. Snake River, Idaho, United States Description An account of the resource 1:24000 Medium The material or physical carrier of the resource. 1 Has Version A related resource that is a version, edition, or adaptation of the described resource. <a href="https://www.sciencebase.gov/catalog/item/58922ddfe4b072a7ac13c1d0" target="_blank" rel="noreferrer">Digital Map Link</a> Relation A related resource Buhl, Clover, Niagra Springs, Tuttle, Hagerman Is Part Of A related resource in which the described resource is physically or logically included. "One Hundred Topograhpic Maps Illustrating Specific Physiographic Features" 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 Maps Still Image A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials. Physical Dimensions The actual physical size of the original image. 0/1 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 172 Title A name given to the resource Ticonderoga, N.Y. - V.T. Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Ticonderoga, NY-VT Quadrangle Creator An entity primarily responsible for making the resource US Geological Survey Date Created Date of creation of the resource. 1950 Source A related resource from which the described resource is derived MAP144A-4 Publisher An entity responsible for making the resource available US Geological Survey Subject The topic of the resource Topography Spatial Coverage Spatial characteristics of the resource. Lake George and Ticonderoga, New York, United States Description An account of the resource 1:24000 Extent The size or duration of the resource. 1 Has Version A related resource that is a version, edition, or adaptation of the described resource. <a href="https://www.sciencebase.gov/catalog/item/58953930e4b0fa1e59b993fb" target="_blank">Digital Map Link</a> Relation A related resource Benson, Putnam, Bolton Landing, Paradox Lake, Orwell, Crown Point, Bridport Is Part Of A related resource in which the described resource is physically or logically included. "One Hundred Topograhpic Maps Illustrating Specific Physiographic Features" 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 ISC 144 Map Drawers Still Image A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials. Physical Dimensions The actual physical size of the original image. 0/1 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 172 Title A name given to the resource Ticonderoga, N.Y. - V.T. Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Ticonderoga, NY-VT Quadrangle Creator An entity primarily responsible for making the resource US Geological Survey Date A point or period of time associated with an event in the lifecycle of the resource 1950 Source A related resource from which the described resource is derived MAP144A-4 Publisher An entity responsible for making the resource available US Geological Survey Subject The topic of the resource Topography Spatial Coverage Spatial characteristics of the resource. Lake George and Ticonderoga, New York, United States Description An account of the resource 1:24000 Medium The material or physical carrier of the resource. 1 Has Version A related resource that is a version, edition, or adaptation of the described resource. <a href="https://www.sciencebase.gov/catalog/item/58953930e4b0fa1e59b993fb" target="_blank" rel="noreferrer">Digital Map Link</a> Relation A related resource Benson, Putnam, Bolton Landing, Paradox Lake, Orwell, Crown Point, Bridport Is Part Of A related resource in which the described resource is physically or logically included. "One Hundred Topograhpic Maps Illustrating Specific Physiographic Features" https://www.geosciencecollections.milne-library.org/files/original/e688b86a41946ddcf8cafee376714700.JPG 3ddba4e90997c189a417c5aecc067406 Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2272 Height 1704 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/292ccdb8998155a24bb4844c6a956a04.jpg ebc6c2732c6e3710990e5ed76afbe885 https://www.geosciencecollections.milne-library.org/files/original/d64c852a8e3906d96d8d986f926660c8.jpg 830c05c7ec29b4b43ed28081adaf88f1 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 (GC) Grand Canyon Stratigraphic Suite -- Grand Canyon, Arizona Description An account of the resource This collection contains 21 samples. They are a representation of samples of lithology from the early precambrian to the late permian. The stratigraphic sequence contains a variety of rocks including, but not limited to schist, limestone, and sandstone. These specimens are representative of the geologic section in the Grand Canyon, but no specimens were collected within the boundaries of the National Park. 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: Blakey, R.C., and Middleton, L.T., 2012, Geologic history and paleogeography of paleozoic and early mesozoic sedimentary rocks, eastern Grand Canyon, Arizona: Geologic Society of America Bulletin, v. 489, pp. 81-92, doi: <a href="%20http%3A//dx.doi.org/10.1130/2012.2489(05)">10.1130/2012.2489(05)</a> <a href="http://dx.doi.org/10.1130/2012.2489(05)%20" target="_blank"> </a> <ul><li>This reference outlines the stratigraphy found in this suite. It specifically highlights the paleozoic era in which the samples represent.Â </li> </ul> Additional Resources:Â Brown, E.H., Babcock, R.S., Clark, M.D., and Livingston, D.E., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon Part I. Petrology and structure of the Vishnu Complex: Precambrian Research, v. 8, p. 219-241, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90030-5%20">10.1016/0301-9268(79)90030-5Â </a> <ul><li>Brown et al. begins this series of 3 articles outlining the geologic timescale and discusses the Vishnu complex and how it fits into the geologic timescale. It provides an explaination for several of the samples in this collection.Â </li> </ul> Brown, E.H., Babcock, R.S., Clark, M.D., and Livingston, D.E., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon Part II. The Zoroaster Plutonic Complex and related rocks: Precambrian Research, v. 8, p. 243-275, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90031-7" target="_blank">10.1016/0301-9268(79)90031-7</a> <ul><li>In the second part of the article, the authors discuss the importance of the pluton and how it affected the formation of the stratigraphic profile of the grand canyon.Â </li> </ul> Clark, M.D., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon. Part III. Petrology of mafic schists and amphibolites: Precambrian Research, v. 8, p. 277-302, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90032-9" target="_blank">10.1016/0301-9268(79)90032-9</a> <ul><li>The final section of this discussion set provides insight into the mafic layers of the stratigraphic column.Â </li> </ul> Ilg, B.R., Karlstrom, K.E., Hawkins, D.P., and Williams, M.L., 1996,Â Tectonic evolution of Paleoproterozoic rocks in the Grand Canyon: Insights into middle-crustal processes:Â Bulletin of the Geological Society of America, v. 108, p. 1149-1166, doi:Â <a href="http://dx.doi.org/10.1130/0016-7606(1996)108" target="_blank">10.1130/0016-7606(1996)108</a> <ul><li>This is a general look into the formation of the stratigraphic layers. This article does a good job combining the above articles into one condensed summary.Â </li> </ul> Spatial Coverage Spatial characteristics of the resource. Peach Springs, Mohave Co., Arizona Peach Springs, Coconino Co., Arizona Seligman, Ysvupai Co., Arizona Williams, Coconino Co., Arizona Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Temporal Coverage Temporal characteristics of the resource. Samples range from Precambrian - Permian Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Toroweap 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 Toroweap Limestone Description An account of the resource A sample from the gamma member of the Toroweap Formation. It is an orangish-brown sample. Both thin section images were taken at a 400x magnification. Date A point or period of time associated with an event in the lifecycle of the resource no date 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://www.geosciencecollections.milne-library.org/items/show/1">Grand Canyon Western Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context GC-18 Spatial Coverage Spatial characteristics of the resource. Prominent bluff near US 66 at S. end of Aubrey Cliffs, see specimen 14 locality. Temporal Coverage Temporal characteristics of the resource. Permian Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Alternative Title An alternative name for the resource. The distinction between titles and alternative titles is application-specific. Shaley Limestone https://www.geosciencecollections.milne-library.org/files/original/740b4545553f1b58d02ad3a72493ad60.JPG 088a0ee8f06beaba8a3eba0fa6454a3a Omeka Image File The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files. Width 2272 Height 1704 Bit Depth 8 Channels 3 https://www.geosciencecollections.milne-library.org/files/original/f7ff4143b460844fa72c33db4f6ca49c.jpg ebc6c2732c6e3710990e5ed76afbe885 https://www.geosciencecollections.milne-library.org/files/original/a1170c0c6981c593a18092bc005070f6.jpg 830c05c7ec29b4b43ed28081adaf88f1 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 (GC) Grand Canyon Stratigraphic Suite -- Grand Canyon, Arizona Description An account of the resource This collection contains 21 samples. They are a representation of samples of lithology from the early precambrian to the late permian. The stratigraphic sequence contains a variety of rocks including, but not limited to schist, limestone, and sandstone. These specimens are representative of the geologic section in the Grand Canyon, but no specimens were collected within the boundaries of the National Park. 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: Blakey, R.C., and Middleton, L.T., 2012, Geologic history and paleogeography of paleozoic and early mesozoic sedimentary rocks, eastern Grand Canyon, Arizona: Geologic Society of America Bulletin, v. 489, pp. 81-92, doi: <a href="%20http%3A//dx.doi.org/10.1130/2012.2489(05)">10.1130/2012.2489(05)</a> <a href="http://dx.doi.org/10.1130/2012.2489(05)%20" target="_blank"> </a> <ul><li>This reference outlines the stratigraphy found in this suite. It specifically highlights the paleozoic era in which the samples represent.Â </li> </ul> Additional Resources:Â Brown, E.H., Babcock, R.S., Clark, M.D., and Livingston, D.E., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon Part I. Petrology and structure of the Vishnu Complex: Precambrian Research, v. 8, p. 219-241, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90030-5%20">10.1016/0301-9268(79)90030-5Â </a> <ul><li>Brown et al. begins this series of 3 articles outlining the geologic timescale and discusses the Vishnu complex and how it fits into the geologic timescale. It provides an explaination for several of the samples in this collection.Â </li> </ul> Brown, E.H., Babcock, R.S., Clark, M.D., and Livingston, D.E., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon Part II. The Zoroaster Plutonic Complex and related rocks: Precambrian Research, v. 8, p. 243-275, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90031-7" target="_blank">10.1016/0301-9268(79)90031-7</a> <ul><li>In the second part of the article, the authors discuss the importance of the pluton and how it affected the formation of the stratigraphic profile of the grand canyon.Â </li> </ul> Clark, M.D., 1979,Â Geology of the older Precambrian rocks of the Grand Canyon. Part III. Petrology of mafic schists and amphibolites: Precambrian Research, v. 8, p. 277-302, doi:Â <a href="http://dx.doi.org/10.1016/0301-9268(79)90032-9" target="_blank">10.1016/0301-9268(79)90032-9</a> <ul><li>The final section of this discussion set provides insight into the mafic layers of the stratigraphic column.Â </li> </ul> Ilg, B.R., Karlstrom, K.E., Hawkins, D.P., and Williams, M.L., 1996,Â Tectonic evolution of Paleoproterozoic rocks in the Grand Canyon: Insights into middle-crustal processes:Â Bulletin of the Geological Society of America, v. 108, p. 1149-1166, doi:Â <a href="http://dx.doi.org/10.1130/0016-7606(1996)108" target="_blank">10.1130/0016-7606(1996)108</a> <ul><li>This is a general look into the formation of the stratigraphic layers. This article does a good job combining the above articles into one condensed summary.Â </li> </ul> Spatial Coverage Spatial characteristics of the resource. Peach Springs, Mohave Co., Arizona Peach Springs, Coconino Co., Arizona Seligman, Ysvupai Co., Arizona Williams, Coconino Co., Arizona Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. Temporal Coverage Temporal characteristics of the resource. Samples range from Precambrian - Permian Rock A physical material with a mineral composition. Unit Formation or other descriptive rock category Toroweap 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 Toroweap Limestone Description An account of the resource Sample from the beta member of the Toroweap formation. Sample is light tan-orangish with weathered surfaces. Both thin section images were taken at a 400x magnification. Date A point or period of time associated with an event in the lifecycle of the resource no date 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://www.geosciencecollections.milne-library.org/items/show/1">Grand Canyon Western Minerals Supplementary Information</a> Identifier An unambiguous reference to the resource within a given context GC-19 Spatial Coverage Spatial characteristics of the resource. Prominent bluff near US 66 at S. end of Aubrey Cliffs, see specimen 14 locality. Temporal Coverage Temporal characteristics of the resource. Permian Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. 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 (MC) Magnet Cove Alkaline Igneous Complex -- Magnet Cove, Arkansas 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 MC-12 Title A name given to the resource Trachy phonolite Spatial Coverage Spatial characteristics of the resource. Magnet Cove, Arkansas 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/files/original/7750c92ef663d3a3bc3536cbc49dc9e7.pdf">MC Rock Suite</a> Description An account of the resource Dark, finer-grained Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://www.geosciencecollections.milne-library.org/files/original/0827359bd137835a2bcd900b334d1f61.jpeg c80cb92f034830e7c2d32d4297937e31 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 Hand Sample https://www.geosciencecollections.milne-library.org/files/original/2350c5bcc0df1eb802394c7dff2822f6.jpg 29eb94efd404a37f6740b407c2a2bbbf 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 40x Magnification https://www.geosciencecollections.milne-library.org/files/original/45683e937e50b90495e24254b9214afa.jpg 6e162489528463ef773cf5277ec592fa 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 100x Magnification 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 (HA) Volcanic Phenomena Suite -- The Hawaiian Islands of Hawaii and Oahu Description An account of the resource These 31 samples comprise a collection of volcanic rocks associated with the hot-spot volcanism of the Hawaiian Islands. Samples were collected from various locations across the islands of Hawaii and Oahu. The collection contains samples of primarily tholeiitic & alkalic basalts, pumice, scoria, oceanite, and hawaiite. Contributor An entity responsible for making contributions to the resource Western Minerals, Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1969 Identifier An unambiguous reference to the resource within a given context HA-1 - HA-31 Spatial Coverage Spatial characteristics of the resource. Samples were collected from various locations on the islands of Hawaii and Oahu. Temporal Coverage Temporal characteristics of the resource. Samples formed from Holocene eruptions of the past 300 years. Dated samples formed between 1750 and 1960. Accrual Method The method by which items are added to a collection. Purchased from Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here: Macdonald, G.A., 1949, Petrography of the Island of Hawaii, U.S.G.S. Prof. Paper 214 D <ul><li>This article is a part of the general investigation of the island of Hawaii by the United States Geologic Survey. The paper describes the dominant volcanoes of the island of Hawaii (from which most of the suite's samples were collected) and describes the petrographic phenomena observed and geochemical analyses of volcanic rocks.Â </li> </ul>Additional Resources: Ho, R.A., Garcia, M.O., 1988, Origin of differentiated lavas at Kilauea Volcano, Hawaii; implications from the 1955 eruption: Bulletin of Volcanology, v. 50, p. 35-46. <ul><li>This article describes a study of lava flows from the 1955 eruption of the Kilauea Volcano on the island of Hawaii to evaluate models of crystal fractionation or magma mixing as the processes forming differentiated magmas. Through geochemical analyses, the study concluded that crystal fractionation resulted in the observed differentiation of lavas.</li> </ul> Hofman, A.W., Farnetani, C.G., 2013, Two Views of Hawaiian Plume Structure: Geochemistry, Geophysics, Geosystems, v.14, p. 5308-5322, doi:10.1002/2013GC004942 <ul><li>This article presents two opposing views of the source of magmas for the Hawaiian volcanoes. Both views favor a deep mantle source, but try to explain differences in isotopic compositions.</li> </ul> Macdonald, G.A., 1968, Composition and origin of Hawaiian LavasÂ in GSA Memoirs 1968, p. 477-522 <ul><li>This article provides geochemical analysis of major elements as well as determinations of minor elements of volcanic rocks from the island of Hawaii. The article describes the three major rock types - tholeitic, alkalic, and nephelinic - and concludes these rock suites are chemically intergradational and are likely derived from crystal differentiation of a single parent magma.</li> </ul> Moore, J.G., Clague, D.A., 1992, Volcano growth and evolution of the Island of Hawaii: Geologic Society of America Bulletin, v. 104, p. 1471-1484 <ul><li>This article proposes a chronologic evolution of the island of Hawaii, from where many of the suite's samples were collected.</li> </ul> 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 Trachyte Description An account of the resource Trachytes are an igneous volcanic rock with an aphanitic or porphyritic texture. Alkali feldspar, low amounts of plagioclase and quartz or a feldspathoid are common in trachytes. Hand Sample: Aphanitic, light gray trachyte. On cut face, inclusions ranging from 0.8cm to 2cm in length with abundant vesicles less than 0.05cm in diameter can be observed. Thin Section: Composed nearly entirely of glass material with some subhedral to euhedral plagioclase crystals that vary in size. Contributor An entity responsible for making contributions to the resource Western Minerals Is Part Of A related resource in which the described resource is physically or logically included. <a href="http://www.geosciencecollections.milne-library.org/collections/show/656">Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu</a> Identifier An unambiguous reference to the resource within a given context HA-18 Spatial Coverage Spatial characteristics of the resource. North side of Hualalai - Puu Anahulu - Island of Hawaii Date A point or period of time associated with an event in the lifecycle of the resource Sample collected January, 1969 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 (MC) Magnet Cove Alkaline Igneous Complex -- Magnet Cove, Arkansas 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 MC-16 Title A name given to the resource Trachyte Spatial Coverage Spatial characteristics of the resource. Magnet Cove, Arkansas 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/files/original/7750c92ef663d3a3bc3536cbc49dc9e7.pdf">MC Rock Suite</a> Description An account of the resource Light gray Accrual Method The method by which items are added to a collection. Purchased from Western Minerals Inc. https://www.geosciencecollections.milne-library.org/files/original/b8fb1b782520c8365c4e6b54411b694b.JPG 3ce3f0f35578c970d02f789971931fe1 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 Hand Sample https://www.geosciencecollections.milne-library.org/files/original/3d7a8c646d55cf897a2cc7445e1aee6a.jpg 3ba2d35483922f06346cbce789253e2a 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 40x Magnification https://www.geosciencecollections.milne-library.org/files/original/763a996ce6a7e53caeadd4eb2be897ec.jpg f7b3f57ca15187feba3916cc74fa9650 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 100x Magnification 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 (HA) Volcanic Phenomena Suite -- The Hawaiian Islands of Hawaii and Oahu Description An account of the resource These 31 samples comprise a collection of volcanic rocks associated with the hot-spot volcanism of the Hawaiian Islands. Samples were collected from various locations across the islands of Hawaii and Oahu. The collection contains samples of primarily tholeiitic & alkalic basalts, pumice, scoria, oceanite, and hawaiite. Contributor An entity responsible for making contributions to the resource Western Minerals, Inc. Date A point or period of time associated with an event in the lifecycle of the resource 1969 Identifier An unambiguous reference to the resource within a given context HA-1 - HA-31 Spatial Coverage Spatial characteristics of the resource. Samples were collected from various locations on the islands of Hawaii and Oahu. Temporal Coverage Temporal characteristics of the resource. Samples formed from Holocene eruptions of the past 300 years. Dated samples formed between 1750 and 1960. Accrual Method The method by which items are added to a collection. Purchased from Western Minerals, Inc. References A related resource that is referenced, cited, or otherwise pointed to by the described resource. Start here: Macdonald, G.A., 1949, Petrography of the Island of Hawaii, U.S.G.S. Prof. Paper 214 D <ul><li>This article is a part of the general investigation of the island of Hawaii by the United States Geologic Survey. The paper describes the dominant volcanoes of the island of Hawaii (from which most of the suite's samples were collected) and describes the petrographic phenomena observed and geochemical analyses of volcanic rocks.Â </li> </ul>Additional Resources: Ho, R.A., Garcia, M.O., 1988, Origin of differentiated lavas at Kilauea Volcano, Hawaii; implications from the 1955 eruption: Bulletin of Volcanology, v. 50, p. 35-46. <ul><li>This article describes a study of lava flows from the 1955 eruption of the Kilauea Volcano on the island of Hawaii to evaluate models of crystal fractionation or magma mixing as the processes forming differentiated magmas. Through geochemical analyses, the study concluded that crystal fractionation resulted in the observed differentiation of lavas.</li> </ul> Hofman, A.W., Farnetani, C.G., 2013, Two Views of Hawaiian Plume Structure: Geochemistry, Geophysics, Geosystems, v.14, p. 5308-5322, doi:10.1002/2013GC004942 <ul><li>This article presents two opposing views of the source of magmas for the Hawaiian volcanoes. Both views favor a deep mantle source, but try to explain differences in isotopic compositions.</li> </ul> Macdonald, G.A., 1968, Composition and origin of Hawaiian LavasÂ in GSA Memoirs 1968, p. 477-522 <ul><li>This article provides geochemical analysis of major elements as well as determinations of minor elements of volcanic rocks from the island of Hawaii. The article describes the three major rock types - tholeitic, alkalic, and nephelinic - and concludes these rock suites are chemically intergradational and are likely derived from crystal differentiation of a single parent magma.</li> </ul> Moore, J.G., Clague, D.A., 1992, Volcano growth and evolution of the Island of Hawaii: Geologic Society of America Bulletin, v. 104, p. 1471-1484 <ul><li>This article proposes a chronologic evolution of the island of Hawaii, from where many of the suite's samples were collected.</li> </ul> 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 Trachyte Obsidian Description An account of the resource Hand Sample: Aphanitic dark gray trachyte. Sample contains zones with abundant tiny vesicles (less than 0.1cm in diameter), however the majority of the sample does not contain any vesicles or phenocrysts. Thin Section: Composed of aphanitic plagioclase grains displaying characteristic twinning in addition to a large amount of glass. Contributor An entity responsible for making contributions to the resource Western Minerals Is Part Of A related resource in which the described resource is physically or logically included. Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu Identifier An unambiguous reference to the resource within a given context HA-22 Spatial Coverage Spatial characteristics of the resource. Puu Waawaa quarry,Hualalai - Island of Hawaii Date A point or period of time associated with an event in the lifecycle of the resource Sample collected in January, 1969. 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 (BKM) Belknap Mountains Ring Complex -- White Mountains, New Hampshire 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 BKM-14 Title A name given to the resource Trap shenite breccia Spatial Coverage Spatial characteristics of the resource. Mt. Rowe, New Hampshire Accrual Periodicity The frequency with which items are added to a collection. 1980 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/files/original/df566258e339655610e57ce52cf18970.pdf">BKM Rock Suite</a> Description An account of the resource fine grained trap with abundant fragments of brecciated syenite Accrual Method The method by which items are added to a collection. Purchased from Western Minerals, Inc. 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 (SW) Stillwater Complex -- Montana 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 SW-12 Title A name given to the resource Troctolite Spatial Coverage Spatial characteristics of the resource. Stillwater County, Montana Temporal Coverage Temporal characteristics of the resource. approx. 2700 M.y. 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/files/original/c299ac286818b1a6c702d3cf0cec5b9d.pdf">SW Rock Suite</a> Description An account of the resource No associated sulfides Accrual Method The method by which items are added to a collection. Purchased from Western Minerals, Inc.