Here's why:
* Metamorphism: This process involves changes in the mineral composition and texture of existing rocks due to heat and pressure, without actually melting the rock.
* Granite: Granite is an igneous rock, meaning it formed from cooled magma.
* High Temperatures and Pressures: These conditions are common in the Earth's crust and mantle.
* No Melting: While high temperatures and pressures can cause melting, the specific conditions can also lead to metamorphic changes.
Examples of metamorphic rocks formed from granite:
* Gneiss: A metamorphic rock with a banded or layered appearance, often formed from granite.
* Schist: Another metamorphic rock with a foliated (layered) texture, also potentially formed from granite.
Key Point: The transformation of granite into a metamorphic rock is a result of changes in its mineral structure and texture, not a complete change in its chemical composition.
