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Unformatted text preview: pyroclastic(rock in fragments). The slower the cooling, the larger the crystal it-> aphanitic: extrusive rocks, phaneritic: intrusive rocks. Composition: (felsic > 65%. Igneous Rock textures: brooks/core. Classification of igneous rocks: Aphanitic: Rhyolite -> Andesite -> Basalt Phaneritic: Granite -> Diorite -> Gabbro -> Peridotite...
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- Spring '10