en.wikipedia.org/wiki/Metamorphic_rockMetamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.The protolith may be a sedimentary, igneous, or existing metamorphic rock.
www.usgs.gov/faqs/what-are-metamorphic-rocks-0Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.
geology.com/rocks/metamorphic-rocks.shtmlMetamorphic 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. Minerals: Information about ore minerals, gem materials ...
www.eartheclipse.com/.../formation-types-and-examples-of-metamorphic-rocks.htmlWhat are Metamorphic Rocks? Metamorphic rocks are the rocks formed from other rocks. They are sedimentary or igneous rocks that have undergone changes as a result of extreme pressure and heat. The name defines their formation whereby ‘meta’ means change and ‘morph’ means ‘form.’
www.nps.gov/subjects/geology/metamorphic.htmMetamorphic rock creates a zebra striped pattern in the canyon walls of Marble Canyon. Death Valley National Park, California and Nevada. NPS photo by Dan Kish. Metamorphic rocks form when high temperatures and pressure act on a rock to alter its physical and chemical properties (metamorphism means ...
www.coolkidfacts.com/metamorphic-rock-factsMetamorphic Rocks For Kids. Rocks are made up of one or more minerals. Although different rocks can contain the same minerals, they are sorted into different types of rocks depending on how they were formed.. Metamorphic rocks form when existing rocks are exposed to heat and pressure deep within the Earth’s surface. That’s a pretty neat way of understanding different types of rocks!
www.thoughtco.com/about-metamorphic-rocks-1438952Metamorphic rocks are the third great class of rocks. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. The four main agents that metamorphose rocks are heat, pressure, fluids, and strain.
www.onegeology.org/eXtra/kids/metamorphic.htmlOther common metamorphic rocks are called marble, gneiss, schist. More information. A metamorphic rock is a result of a transformation of a pre-existing rock. The original rock is subjected to very high heat and pressure, which cause obvious physical and/or chemical changes. Examples of these rock types include marble, slate, gneiss, schist.
quizlet.com/122875143/metamorphic-rocks-flash-cardsContact metamorphism is a type of metamorphism where rock minerals and texture are changed, mainly by heat, due to contact with magma. This is an easy name to recall if you remember that these rocks change by actually coming in contact with something very hot, like magma.