12 lines
341 B
Plaintext
12 lines
341 B
Plaintext
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= Metamorphic rock =
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Rocks formed via chemical reactions to existing rock by placing them under
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extreme heat and pressure
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== Formation ==
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* existing rock of any type is placed under heat and pressure
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* usually by burying it
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* rock must NOT be melted in this process
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* can also form from folding in one direction and presence of water
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