(blue color is epoxy)
different size particles
a characteristic pattern
under natural light
under crossed polarizers
calcium carbonate
calcium carbonate
| Quartz grains: (blue color is epoxy) |
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| Dolomitic silty shale: different size particles |
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| Microcline (K-feldspar): a characteristic pattern |
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| Siltstone: under natural light |
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| Siltstone: under crossed polarizers |
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| A red algae: calcium carbonate |
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| Cellular structure of a marine (benthic) organism: calcium carbonate |
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| all photos © Sandstone Petrology CD, 2007 | ||