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Igneous Rocks


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Specimens are available for use in a wide variety of organic and inorganic testing procedures. Organic samples can be utilized for dissection purposes or studying whole preserved or life specimens, with practical examples in cellular biology or the internal structures of whole organs and complex multicellular systems. Rock specimens are useful for studying textures, grain sizes, and other features brought about by pressure, temperature, and other natural forces, offering a glimpse into the Earth’s geological history.


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Catalog Number: (470025-354)

Description:   Examine the Mineral Composition of Igneous Rocks
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Description:   Pumice is light colored glassy rock that floats in water.
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Description:   Syenite a light-colored rock consisting of feldspars and hornblende.
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Description:   Gray andesite with large, blocky hornblende phenocrysts.
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Description:   Pink feldspar mineral with a moh's hardness 6.
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Description:   Classic, very coarse-grained igneous texture.
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Description:   Introduce your students to Gray Andesite with large phenocrysts of hornblende.
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Description:   Obsidian is hard black colored, volcanic glass.
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Description:   Medium-grained with biotite.
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Description:   Dark gray, with hornblende as the dominant mafic mineral.
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Description:   Light gray, with flow structure.
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Description:   Coarse-grained plagioclase and pyroxene with some olivine.
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Description:   Dark gray, composed mostly of pyroxene and olivine.
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Description:   Coarse, “salt and pepper”: dark pyroxene and light andesine.
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Description:   Fine to medium-grained with biotite.
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Description:   Classic, dark; from the Columbia Plateau.
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