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Rock Specimens
Description:
Chert is a microcrystalline, hard, silica mineral.
Description:
Pink and gray bands, with biotite; shows good foliation.
Description:
Black, soft; most widely mined.
Description:
Typical green-gray, fissile, clay-rich.
Description:
Well-cemented, medium-grained orthoquartzite.
Description:
High grade metamorphosed rock showing bands of quartz, feldspar, and biotite.
Description:
Pink feldspar mineral with a moh's hardness 6.
Description:
Soapstone is a talc-schist primarily composed of talc.
Description:
Pale pink felsite, with small sanidine phenocrysts.
Description:
Black, fissile; commonly with carbonized fossil plant impressions.
Description:
Fine crystalline, pure calcite.
Description:
Gray to buff, with numerous ooliths and fossil fragments.
Description:
Limestone is a gray calcium carbonate that will fizz with dilute HCl.
Description:
Gray to brown mudstone with abundant silt.
Description:
Dark gray with abundant gas pocket vesicles.
Description:
Samples of Intrusive and Extrusive Igneous Rocks
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