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Naturally occurring rock that has been transformed by heat and pressure in the Earth's crust.
Naturally occurring rock that has been transformed by heat and pressure in the Earth's crust. The rocks transformed in this way may start the process as sedimentary or igneous. Typical metamorphic rocks include slate, which is formed from shale, and marble which is formed from limestone.
The rocks transformed in this way may start the process as sedimentary or igneous. Typical metamorphic rocks include slate, which is formed from shale, and marble, which is formed from limestone.