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Metamorphic rock

rock arising from metamorphism, in which an original rock (either sedimentary, igneous, or another metamorphic rock) is subjected to heat (>600 °C) and pressure (>200 MPA) causing profound physical or chemical change

Pronunciation
/ˌmɛdəˈmɔrfɪk rɑk/
/mɛtəˈmɔːfɪk rɒk/
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