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Large scale folding rocks are a characteristic of regional metamorphism. Regional metamorphism will occur during the process of building mountains.
The greatest volume of metamorphic rock is produced during regional metamorphism. It affects an extensive area as a result of the large-scale action of heat and pressure.
An avalanche
The presence of intrusive magma in an area (known as contact metamorphism), or of tectonic plate interactions on a larger scale (known as regional metamorphism) puts the igneous and sedimentary rocks and minerals under heat or pressure which may cause changes in their chemistry and crystal structure. The result is the creation of metamorphic rocks. Gemstones associated with metamorphic rock include the beryls, jade, lapis lazuli, turquoise, spinel, ruby, sapphire and zircon.
Large-scale regional (mainly pressure) metamorphism of sedimentary rocks originating from clay-forming minerals.
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A metaporphic rock is formed when a rock is put under extreame heat and preasure for many (often thousands or millions) of years. This changes it into a new type of rock. This new rock is called a Metamorphic rock.
These rocks get their name from the Greek words 'meta' and 'morph', meaning 'change of form'. Metamorphic rocks are produced by the alteration of pre-formed rocks by pressure, temperature and migrating fluids, often in environments deep in the Earth's crust. Because of the severe conditions which rocks undergo during metamorphism, the original minerals may become unstable and change to maintain equilibrium with the new environment. This can involve changes in mineralogy (recrystallization of existing minerals or formation of new ones) and usually changes in texture from the original rock. Three main types of metamorphism are recognized. Regional metamorphism results from mountain-building events with large scale folding and burial of pre-formed rocks. Contact metamorphism is produced by direct heating of rocks around an igneous intrusion, baking the surrounding country rocks. Dynamic metamorphism occurs where large scale faulting breaks and deforms rocks next to the fault.
"G" scale is the largest scale, often used for garden railways
The strongest tornado in the Fujita scale is F5.
"G" scale is the largest scale, often used for garden railways
The sun, followed by the gas giant planets.