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Our transcription: The conditions under which metamorphism occurs is beneath the level of weathering and sedimentation to form the sedimentary rocks. Generally at temperatures about or greater than 200 degrees and at conditions that do not produce a melt that goes into igneous rocks. So the range in temperatures are roughly about 200 degrees C to about 800 degrees C. They occur, the process and the formation of the rocks, occur at depths generally from two to several tens of kilometers in depth beneath the Earth's surface.
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