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Pumice grain to the right of center and detrital quartz to the left of center surrounded by calcite cement. PPL |
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Glass shards in sandstone. PPL |
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Twinned detrital feldspar grain in calcite cement. CPL |
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Detrital monocrystalline quartz grain with a dust rim and authigenic quartz overgrowth that is abraded. CPL |
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Volcanic rock fragment with biotite, pyroxene, plagioclase and glass surrounded by calcite cement. PPL |
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Volcanic rock fragment (same as above) CPL |
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Pumice fragment with the vesicles filled by calcite cement. CPL |
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Detrital feldspar grain with abundant inclusion in the center. CPL |
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Detrital feldspar grain with abundant and ordered mineral inclusions. CPL |
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Detrital feldspar grain displaying two well formed cleavages. CPL |
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Pumice grain with well formed vesicles. PPL |
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Detrital, rounded feldspar grain. CPL |
Photomicrographs (c) James A. Dockal 2005
Page Created September 27, 2005