Metamorphic Rocks

Metamorphic Rocks — page 3
what are metamorphic rocks Metamorphic rocks are one of the three main rock types They are made up of one or more minerals There are many different metamorphic rocks Marble slate gneiss and hornfels are some of the most common Metamorphic rocks are usually deep below Earth’s surface But these rocks can be found all over the world Much of Earth’s surface is metamorphic rock These rocks are often found in mountain ranges GNEISS FORMATION IN MAINE