Andesite, an extrusive igneous rock
Andesite is an igneous rock consisting of plagioclase feldspar and hornblende, biotite or augite. It is extrusive, formed when lava reaches the surface of the earth through fissures, vents or volcanoes. It's texture is aphanitic (microcrystalline); minera
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13625732
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43070486
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Mark A. Schneider /Science Source/ www.ardea.com
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13625732
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Andesite Aphanite Aphanitic Extrusive Feldspar Hand Igneous Mineralogy Plagioclase Sample Silhouettable Specimen Volcanic
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