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What is metamorphic rock with example? How metamorphic rocks are formed?

                                    Metamorphic rocks are formed from older rocks. The older rocks may be either sedimentary or igneous rocks. When old rocks are experienced high temperature, pressure, and shearing stress at a considerable depth in the earth's crust, then the older rocks change chemically, structurally, and mineralogically by producing rocks with new texture and chemical composition, such rocks are called metamorphic rocks. The process in which the older rocks start to melt due to high pressure and temperature and are recrystallized with new minerals composition, such process is called metamorphism.    The agents, which are responsible for bringing about metamorphic changes or the agents of metamorphism are as follows- 1)  Temperature:   Temperature is one of the most important agents or factors of metamorphism. Due to high temperatures, pre-existing rocks like ...
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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 affecte...
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What is a volcano and how a volcano is formed?

                                             Answer:  A volcano is a dome or conical-like structure, which is formed due to volcanic eruption at the divergent plate boundary.             In simple words, volcanoes are formed due to volcanic eruptions.           Due to the decay of radioactive substances beneath the surface of the earth or in the earth’s mantle, a large amount of heat produced below the earth's surface, which melts the rocks slowly and forms a thick flowing layer of substance is called magma (consisting of the mixer of minerals, water vapor, different kinds of dissolved gases like carbon dioxide, sulfur, carbon monoxide, etc. Magma continuously exerts pressure on the earth's surface to escape from the earth's mantle. As a result, the surface of the earth becomes we...
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