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12 Cards in this Set
- Front
- Back
Igneous Rocks
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any rock that crystalizes from out of a molten rock
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Magma
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Molten rock below ground
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Lava
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Molten rock at the surface
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Mafic
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Molten rock high in metals such as Fe and Mg and low in Si
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Felsic
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Molten rock high in Si and low in metals
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A a
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angular, sharp jagged, lava flows slow moving
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Pahoehoe
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smooth, ropy, fluid lava flows fast moving
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Intrusive
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igneous rocks that cool underground... Typically fast moving
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Extrusive
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igneous rocks that cool at the surface... typically slow
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Porphory
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an igneous rock that exhibits 2 cooling rates
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Phenocryst
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large crystals found in porphory
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xenolith
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a piece of "country rock" included within an igneous rock
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