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24. Feb. 2024 · Metamorphic rocks form primarily at convergent plate boundaries and in mountain ranges due to the immense pressures and temperatures present. They also form at the contact between magma and existing rock (contact metamorphism). While they are widespread, they constitute about 15% to 25% of the Earth’s upper crust.
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.
Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of the rocks. There are two basic types of metamorphic rocks.
Metamorphes Gestein oder Metamorphit ist das gegenüber seinem Ursprungsgestein ( Protolith) durch die Erhöhung von Druck und/oder Temperatur in der Erdkruste entstandene, veränderte Gestein. Bei dieser Umwandlung wurde der feste Zustand beibehalten. Der Umwandlungsprozess wird als Metamorphose bezeichnet. Inhaltsverzeichnis. 1 Entstehung.
metamorphic rock, Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary, or other metamorphic rocks.
Metamorphic rocks form when heat and pressure transform an existing rock into a new rock. Contact metamorphism occurs when hot magma transforms rock that it contacts. Regional metamorphism transforms large areas of existing rocks under the tremendous heat and pressure created by tectonic forces.
Metamorphism is the change that takes place within a body of rock as a result of it being subjected to conditions that are different from those in which it formed.
