igneous rocks
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14 Terms
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Granite
Intrusive, felsic, coarse-grained. mostly quartz + K-feldspar + plagioclase + biotite/muscovite
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Rhyolite
Extrusive, felsic. Fine-grained or glassy, high-viscosity lava
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diorite
Intrusive, intermediate, coarse-grained. plagioclase + amphibole + biotite
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Andesite
Extrusive, intermediate. fine-grained, subduction-zone volcanoes
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gabbro
Intrusive, mafic, coarse-grained
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basalt
Extrusive, mafic. Found at mid-ocean ridges, hotspots, flood basalts
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Peridotite
intrusive, ultramafic. Coarse-grained, dominant rock of upper mantle
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Note 
Flashcards (31)