Regional metamorphism is a geological process that occurs over large areas typically associated with tectonic plate collisions or mountain-building events. It involves high pressures and temperatures, altering the mineralogy, texture, and structure of rocks. Commonly found in regions with significant crustal deformation, such as convergent plate boundaries or collision zones, regional metamorphism can create rocks like schist, gneiss, and marble from pre-existing sedimentary, igneous, or metamorphic rocks. This process can also cause the alignment of minerals into foliation, reflecting the directional pressure during metamorphism. Regional metamorphism provides valuable insights into Earth's tectonic history and the processes shaping its crust over millions of years.
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