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Igneous Rocks


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Description:   Coarse-grained, with microcline, biotite and horblende phenocrysts.
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Description:   Gray-to-brown basaltic, with over 50% vesicles.
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Description:   Coarse-grained plagioclase and pyroxene with some olivine.
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Description:   Classic, dark; from the Columbia Plateau.
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Description:   Abundant small black phenocrysts in a gray to brown matrix.
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Catalog Number: (470106-756)

Description:   <i>Includes</i>: six each of obsidian, pumice, and basalt. Set of 18.<BR><BR>Common rocks and minerals for testing and identification studies are 2–3cm each.
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Description:   Obsidian is hard black colored, volcanic glass.
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Catalog Number: (470026-142)

Description:   Banded volcanic glass.
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Description:   Gray andesite with large, blocky hornblende phenocrysts.
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Description:   Samples of Intrusive and Extrusive Igneous Rocks
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Description:   Introduce your students to Gray Andesite with large phenocrysts of hornblende.
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Description:   Pumice is light colored glassy rock that floats in water.
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Description:   Porphyritic igneous rock containing biotite, feldspar, and hornblende.
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Description:   Pegmatite is igneous rock similar to granite but with larger crystals.
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Description:   Grayish black trap rock.
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Description:   Glassy; most specimens float in water.
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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us at 1-800-962-2660.
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