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Rock Specimens
Description:
Light grayish green, fine-grained, well-foliated, schistose.
Description:
White and black bands of quartz, feldspar, and biotite; typical foliation.
Description:
Lustrous, black 'hard coal'.
Description:
Light gray, fine small clasts.
Description:
Abundant small black phenocrysts in a gray to brown matrix.
Description:
Slaty metamorphic rock containing hematite giving it its red color.
Catalog Number:
(470026-142)
Description:
Banded volcanic glass.
Description:
Chert is a microcrystalline, hard, silica mineral.
Description:
Pink and gray bands, with biotite; shows good foliation.
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.
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