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Igneous Rocks


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Description:   Fine to medium-grained with biotite.
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Description:   Dark gray, with hornblende as the dominant mafic mineral.
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Description:   Pink feldspar mineral with a moh's hardness 6.
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Catalog Number: (470226-462)

Description:   Introduce your students to rocks formed from the cooling of magma and lava.
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Description:   Pyroxenite is ultramafic igneous rock made up of primarily pyroxene minerals.
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Description:   Dark gray, composed mostly of pyroxene and olivine.
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Description:   Dark gray with abundant gas pocket vesicles.
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Catalog Number: (470025-348)

Description:   Study the Formation of Different Igneous Rocks
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Catalog Number: (470346-970)

Description:   Volcanic glass with snowflakes embedded throughout.
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Description:   Classic, very coarse-grained igneous texture.
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Description:   Medium-grained with biotite.
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Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
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Description:   Light gray, with flow structure.
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Description:   Classic, dark; from the Columbia Plateau.
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Description:   Obsidian is hard black colored, volcanic glass.
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Description:   Abundant small black phenocrysts in a gray to brown matrix.
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