Metamorphic rock is created when heat and pressure below the earth's surface changes the structure of a rock. The word metamorphic rock comes from the word "morph", which means change. Metamorphic rock usually forms deep underground.
Marble is a metamorphic rock formed from limestone.
Quartzite is a metamorphic rock formed from sandstone.
This image is a wall made of marble, a type of metamorphic rock.
