Metamorphic rock
Rock formed from another rock that has been a lot of heat or pressure.
Slate
A fine grained metamorphic rock formed as a result of moderate heat and pressure on shale.
Marble
A metamorphic rock formed as a result of big pressure of limestone.
Gneiss
A coarse grained metamorphic rock mainly formed as a result of great pressure of granite
Metamorphism
Metamorphism: the process that changes rocks by extreme pressure or heat.