Browse Items (1651 total)

Western Minerals GC OCR.pdf
OCR PDF of supplemental information for the Grand Canyon collection.

http://dl.dropbox.com/u/66399955/NAO-19.JPG
Relics of augitic clinopyroxene, albite, actinolite, chlorite, clinozoisite, and sphene. Relics of the clinopyroxene of the original dolerite are in part substituted by chlorite and actinolite in a granoblastic and metablastic matrix of albite,…

http://dl.dropbox.com/u/66399955/NAO-18.JPG
Grossular-andradite garnet, diopside, chlorite, sodic pyroxene, vesuvianite, titansphene, opaques. Traces of primitive gabbroid structure with diablastic development of the newlyformed phases and pseudomorphs of sodic pyroxene on primary pyroxenes.…

http://dl.dropbox.com/u/66399955/NAO-17.JPG
Antigorite, magnetite, ankeritic carbonate, diopside, tremolite. A very marked subsequent foliation nearly completely obliterates a previous initial foliation.

http://dl.dropbox.com/u/66399955/NAO-16.JPG
Antigorite, magnetite, carbonates (ankerite), diopside, clinohumite, tremolite, chlorite. Rarely, pseudomorphs on primary pyroxenes may be recognized, though there is superimposition of various deformational phases.

http://dl.dropbox.com/u/66399955/NAO-15.JPG
Gabbro with hydrothermal "oceanic" processes and prehnite-pumpellyite metamorphic overprint.
Plagioclase, clinopyroxene, olivine, ilmenite. metamorphic paragenesis: albite, sericite, chlorite, hematite, sphene, carbonates. Well-preserved relics of…

http://dl.dropbox.com/u/66399955/NAO-14.JPG
Na-clinopyroxene (chloromelanite), almandine garnet, rutile, glaucophanic amphibole, harrisitic hornblende, epidote, ablite, chlorIte. Chloromelanite pseudomorphs on primary pyroxenes and chloromelanitic aggregates in plagioclase; granoblastic…

http://dl.dropbox.com/u/66399955/NAO-13.JPG
Doleritic basalt with metamorphic overimprinting in prehnite-pumpellyite facies.
Primary minerals: plagioclase, titanaugite, ilmenite, olivine.
Metamorphic paragenesis: albite, pumpellyite, prehnite, sphene, chlorite.

http://dl.dropbox.com/u/66399955/NAO-12.JPG
Serpentine (lizardite) with some structural deformation present.

Western Minerals NAO OCR-1.pdf
OCR PDF of supplemental information for the Northern Apennines Ophiolites collection.

Western Minerals PH OCR.pdf
OCR PDF of supplemental information for the Powderhorn Carbonatite collection.

http://dl.dropbox.com/u/66399955/GC-1.JPG
Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-1A.JPG
Both cross polarized and plain polarized images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-2.JPG
Part of the The Granite Gorge Metamorphic Suite, this is usually considered a metavolcanic, and its mineralogy is dominated by quartz and mica.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-3.JPG
This sample is mis-labeled as a pegmatite. It is really a porphyritic dike material that cuts through the Zoroaster Granite. The phenocrysts are hornblende.

http://dl.dropbox.com/u/66399955/GC-4.JPG
Sandstone shows metamorphic overprinting with triple junctions between quartz grains common.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-5.JPG
Mottled lithology of the Muav Limestone.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-6.JPG
Green clay lithology of the Bright Angel Shale.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-7.JPG
Red siltstone lithology of the Bright Angel Shale.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-8.JPG
Limestone containing fossils of the alga, Girvanella.

Both thin section images were taken at a 400x magnification.
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