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Metamorphic Rocks (rock cycle (metamorphism=mineralogical and textural…
Metamorphic Rocks
rock cycle
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caused by pressure, T & fluid conditions different than those when the parent rock formed
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igneous rock --> metamorphic rock sedimentary rock--> metamorphic rock metamorphic rock --> metamorphic rock
what drives metamorphism
increase pressure
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differential (directed stress, which may be compressive or shear)
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metamorphism in ...
regional metamorphism
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recrystallization, new minerals --> foliated rocks
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contact metamorphism
recrystallization, new minerals, veins --> non-foliated rocks
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types
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non foliated
increasing heat, pressure not as important