Metamorphic rock forms from pre-existing rock when heat and pressure cause solid-state transformations.

Question

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Metamorphic rock is formed from pre-existing rock through solid-state transformations that occur due to increased heat and pressure within the Earth's crust. This causes the original rock to change in structure, texture, and mineral composition, resulting in a new type of rock known as metamorphic rock.

Metamorphic Rock Forms from Pre-Existing Rock When Heat and Pressure