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Igneous Rocks


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Description:   Obsidian is hard black colored, volcanic glass.
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Description:   Coarse-grained, with microcline, biotite and horblende phenocrysts.
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Description:   Porphyritic igneous rock containing biotite, feldspar, and hornblende.
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Description:   Gray andesite with large, blocky hornblende phenocrysts.
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Description:   Rhyolite is a pale, pink felsic rock with lower density than most igneous rocks.
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Description:   Classic, very coarse-grained igneous texture.
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Description:   Grayish black trap rock.
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Description:   Pumice is light colored glassy rock that floats in water.
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Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
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Description:   Dark gray, composed mostly of pyroxene and olivine.
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Description:   Gray, fine, friable, with abundant small sanidine crystal fragments.
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Description:   Light gray, with flow structure.
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Description:   Diorite is a mix of dark pyroxene and light andesine provides perfect representation of an intermediate igneous rock.
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Description:   Introduce your students to Gray Andesite with large phenocrysts of hornblende.
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Description:   Pegmatite is igneous rock similar to granite but with larger crystals.
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Catalog Number: (470025-348)

Description:   Study the Formation of Different Igneous Rocks
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