What is metamorphic zone and its types? What is Metamorphic facies? What is grades of metamorphism? What are the texture of metamorphic rocks?
Metamorphic Zone and Metamorphic facies: Metamorphic zone is an area where the same combination of minerals occurs in the bedrock during the metamorphism process. Metamorphic zones occur because metamorphic minerals have a unique range or interval of temperature and pressure at which they are stable. There are three types of metamorphic zones- 1) Epizone: This zone of metamorphism occurs near the earth’s surface. In this zone, generally Cataclastic metamorphism conditions are observed. 2) Mesozone: It is the intermediate zone of metamorphism, which is found below the Epizone. The mesozone condition that is the temperature and pressure promotes the regional metamorphism. 3) Katazone: The bottommost metamorphic zones are known as Katazone. In this zone, the plutonic metamorphism is taken place. Grades of metamorphism: The degree or intensity of metamorphism that has affected a rock is called the grade of metamorphism. It varies directly with the amount of