Metamorphic rocks are formed from existing rocks that have been subjected to high temperatures and pressures, causing them to undergo changes in mineral composition and texture. This process typically occurs deep within the Earth's crust, where the rocks are buried under layers of other rocks. There are two main types of metamorphism: contact metamorphism and regional metamorphism. Contact metamorphism occurs when rocks are in contact with magma, causing localized changes in the rock's structure. Regional metamorphism, on the other hand, occurs over a large area and is often associated with tectonic plate movements and mountain building. Metamorphic rocks are often found in mountain ranges and areas of intense geological activity. They can be identified by their distinct patterns of minerals and textures, such as foliation and banding. Some common examples of metamorphic rocks include marble, slate, and schist. Overall, the formation of metamorphic rocks is a complex process that involves a combination of heat, pressure, and chemical reactions. By studying these rocks, geologists can learn more about the Earth's history and the processes that have shaped its surface over millions of years.