Metamorphic rock is one of the three rock categories in a rock cycle. the materials of metamorphic rock changed by temperature,pressure or fluid. The rock cycle shows that igneous and sedimentary can become metamorphic rocks. Metamorphism is caused due to plate tectonic motion. The best example of metamorphic rock is slate. Its a fine grained metamorphic rock exhibits foliage cleavage its made of small plates crystals of mica and chlorite.
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