Metamorphic Rocks

Metamorphic Rock Formation: As the Earth moves, all types of rock can be pushed deep into the Earth. These rocks are exposed to extreme heat and pressure, causing the structure of the crystals and the texture of the rocks to change. They do not become liquid, but become somewhat molten.

Metamorphic Rock Identification: Hard rocks Foliated bands of fused minerals Crystalline structure with fused edges Movement of the Earth’s lithospheric plates cause the heating and squeezing conditions that form metamorphic rocks.

Common Metamorphic Rock Slate

Common Metamorphic Rock Gneiss