Comment: 12:46 - 13:09 (00:23)
Source: Annenberg/CPB Resources - Earth Revealed - 18. Metamorphic Rocks
Keywords: "James Sadd", heat, pressure, metamorphism, texture, mineral, composition, protolith, "geologic time", water
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Our transcription: When rocks are exposed to the heat and pressure of metamorphism, they undergo changes both in texture and mineral content.
The specific changes that take place depend on a variety of factors including the composition of the original rock, called the "protolith," how much heat or pressure is applied, the length of time of metamorphism, and whether or not water is present.
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Geology School Keywords
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