Kid Definition Metamorphic Rock. Rocks are made up of one or more minerals. The study of the rocks is called petrology petro means rock and logy means study.
Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. This causes the minerals in the original rock to reorient themselves with the long and flat minerals aligning perpendicular to the greatest pressure direction. Back to the top.
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Slate is a type of metamorphic rock that was first part of a lake or ocean bottom. Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means change in form. The three types are. The original rock is subjected to heat temperatures greater than 150 to 200 c and pressure 100 megapascals 1 000 bar or more causing profound physical or chemical change the protolith may be a sedimentary igneous or existing metamorphic rock.