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Igneous Rock Specimens
Description:
Dark gray, composed mostly of pyroxene and olivine.
Description:
Light gray, with flow structure.
Description:
Dark gray, with hornblende as the dominant mafic mineral.
Description:
Coarse, “salt and pepper”: dark pyroxene and light andesine.
Description:
Introduce your students to Gray Andesite with large phenocrysts of hornblende.
Description:
Pale pink felsite, with small sanidine phenocrysts.
Description:
Syenite a light-colored rock consisting of feldspars and hornblende.
Description:
Abundant small black phenocrysts in a gray to brown matrix.
Catalog Number:
(470346-970)
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Description:
Volcanic glass with snowflakes embedded throughout.
Description:
Diorite is a mix of dark pyroxene and light andesine provides perfect representation of an intermediate igneous rock.
Description:
Medium-grained with biotite.
Catalog Number:
(470026-142)
Description:
Banded volcanic glass.
Description:
Anorthosite is an intrusive, igneous rock consisting of predominantly plagioclase feldspar.
Description:
Pyroxenite is ultramafic igneous rock made up of primarily pyroxene minerals.
Description:
Grayish black trap rock.
Description:
Pumice is light colored glassy rock that floats in water.
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