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22 results were found
WardsSci000282
Catalog Number:
(470025-348)
Description:
Study the Formation of Different Igneous Rocks
Description:
Grayish black trap rock.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Dark gray, with hornblende as the dominant mafic mineral.
Description:
Coarse-grained plagioclase and pyroxene with some olivine.
Description:
Coarse-grained, with microcline, biotite and horblende phenocrysts.
Description:
Samples of Intrusive and Extrusive Igneous Rocks
Description:
Classic, very coarse-grained igneous texture.
Description:
Medium-grained with biotite.
Description:
Gray andesite with large, blocky hornblende phenocrysts.
Description:
Classic, dark; from the Columbia Plateau.
Description:
Fine to medium-grained with biotite.
Description:
Abundant small black phenocrysts in a gray to brown matrix.
Description:
Dark gray with abundant gas pocket vesicles.
Description:
Pale pink felsite, with small sanidine phenocrysts.
Catalog Number:
(470026-142)
Description:
Banded volcanic glass.
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