Metamorphic rock is a type of rock that has been transformed from an existing rock type (either igneous, sedimentary, or another metamorphic rock) through a process known as metamorphism. This process involves changes in mineral composition and texture due to factors such as increasing temperature, pressure, and the presence of chemically active fluids. Metamorphic rocks can exhibit foliation (layering) or non-foliation depending on the conditions of their formation. Common examples of metamorphic rocks include schist, gneiss, and marble.
Metamorphic Rock definition
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