Volcanic rock - Wikipedia, the free encyclopedia
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en.wikipedia.org/wiki/Volcanic_rock
Volcanic rocks are among the most common rock types on Earth's surface, ... mostly finely crystalline or have at least fine-grained ground-mass representing that ...
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Birnessite - Wikipedia, the free encyclopedia
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en.wikipedia.org/wiki/Birnessite
Crystal habit, Rarely in platelets, to 50 μm; commonly extremely finely crystalline, spherulitic, cellular. Crystal system, Monoclinic prismatic (pseudohexagonal) 2/ ...
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216.109.210.162/userdata/Cincinnati%20Arch/project%20sn...
216.109.210.162/userdata/Cincinnati%20Arch/project%20snapshot/sept_09/test_well_logging.pdf
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at bottom, all well sorted, friable, sub-rounded, with dolomitic cement, interbeded with Dolomite, buff to white, micro- to very finely crystalline. 976'), Sandstone ...
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reynolds.asu.edu/glg103/rock_textures_crystalline.htm
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Coarse crystals in a finely crystalline to glassy matrix, Ajo, Arizona. bonito_vessicles.jpg (39478 bytes), Very finely crystalline to glassy (too fine to tell ) rock ...
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jsedres.geoscienceworld.org/content/73/6/1022.figures-o...
jsedres.geoscienceworld.org/content/73/6/1022.figures-only
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replaced by very finely crystalline LCD with chambers filled by cement and surrounded by dolomite cement. B) Red algae fragment with cell walls replaced by ...
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www4.nau.edu/geology/glg100/labs/lab11b.html
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(extremely finely crystalline) quartz; commonly occurs as lenses or small blobs in limestone. Color varies, but is usually white or gray. Chert is characterized by a ...
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www.dmr.nd.gov/ndgs/Circulars/Burke/circ135.pdf
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Limestone, light brownish gray, very finely crystalline to fine grained, slight fluorescence and cut from granular part. 6505-6510. Limestone, light brownish gray, ...
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www.awakenwithin.net/shop-gem-moss.html
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Composed of Chalcedony (extremely finely crystalline quartz--called cryptocrystalline). Contains visible impurities in the form of dendrite (a branching figure or ...
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www.kgs.ku.edu/General/Geology/Shawnee/E/03_strat.html
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Locally some pale-yellowish-brown very finely crystalline cherty dolomite occurs ... Olive-gray very finely crystalline dolomite occurs at the top of the Gilmore City ...
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