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Rock Specimens
Description:
Anorthosite is an intrusive, igneous rock consisting of predominantly plagioclase feldspar.
Description:
Grayish black trap rock.
Description:
Glassy; most specimens float in water.
Description:
Brownish black, intermediate stage between peat and bituminous coal.
Description:
Shiny black volcanic glass showing conchoidal fracture and some spherulites.
Description:
Fine crystalline, pure calcite.
Description:
Gray, fine, friable, with abundant small sanidine crystal fragments.
Description:
Gray to tan clastic rock made of silt sized particles.
Catalog Number:
(470025-354)
Description:
Examine the Mineral Composition of Igneous Rocks
Description:
Gabbro is Mafic igneous rock formed deep underground consisting of olivine and pyroxene.
Description:
Designed for Introductory College Petrography Labs
Catalog Number:
(470015-460)
Description:
Shows porphyritic texture in a fine dark matrix abundant large feldspar phenocrysts. Hand specimen.
Catalog Number:
(470025-884)
Description:
Ward's® Dike Rock
Description:
Gray with line crinoid columnal fragments.
Catalog Number:
(470025-138)
Description:
BIOTITE GNEISS THIN SECTION
Catalog Number:
(470226-422)
Description:
Syenite a light-colored rock consisting of feldspars and hornblende.
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