Metamorphic Rocks

A metamorphic Rock can be formed by simply being under the earth’s surface, being exposed to extremely high temperatures and a huge amount of pressure from the layers of rock above. These rocks can be formed by tectonic processes, some which include, continental collisions (this is a process that causes friction, distortion and horizontal pressure). These rocks can also be formed when rock becomes heated rapidly by the intrusion of a hot molten rock, (called magma) and it comes from the earth's interior. Sometimes, metamorphic rocks are formed when rocks are close to some molten magma, and so get heated up. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means, "change in form".
This causes a physical and chemical change to occur to the pre-existing rock. These Metamorphic rocks originally begin as sedimentary, igneous or other types of metamorphic rocks, however through the intense pressure or heat, the overall characteristics of the rock change such as the sheen, the hardness and tightness of the rock grains change as well. Metamorphic rocks are physically very deformed and the rocks have changed chemically, this is because the rock was exposed to different pressures and temperatures. If a Metamorphic rock is formed by pressure, the crystals then get arranged into