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WardsSci000544
Description:
Grayish black trap rock.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Dark gray with abundant gas pocket vesicles.
Description:
Black, fissile; commonly with carbonized fossil plant impressions.
Description:
Useful for weathering and erosion, soil formation, porosity and permeability, or other general earth science labs.
Description:
Abundant small black phenocrysts in a gray to brown matrix.
Description:
Black, soft; most widely mined.
Description:
Gray to brown mudstone with abundant silt.
Description:
Gray to buff, with numerous ooliths and fossil fragments.
Description:
Well-cemented, medium-grained orthoquartzite.
Description:
Pale pink felsite, with small sanidine phenocrysts.
Description:
White and black bands of quartz, feldspar, and biotite; typical foliation.
Description:
White, mature, friable.
Description:
Fine crystalline, pure calcite.
Description:
Samples of Intrusive and Extrusive Igneous Rocks
Description:
Medium-grained with biotite.
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