what is
metamorphic rocks.
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Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
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Hey mate here's your answer.
A rock which has been changed from its original form by heat or pressure. Metamorphism may involve both physical as well as chemical changes in the characteristics of the pre- existing rocks.
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