Mazatzal orogeny
Mountain-building event in North America / From Wikipedia, the free encyclopedia
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The Mazatzal orogeny was an orogenic event in what is now the Southwestern United States from 1650 to 1600 Mya[1] in the Statherian Period of the Paleoproterozoic. Preserved in the rocks of New Mexico and Arizona, it is interpreted as the collision of the 1700-1600 Mya age[1] Mazatzal island arc terrane with the proto-North American continent. This was the second in a series of orogenies within a long-lived convergent boundary along southern Laurentia that ended with the ca. 1200–1000 Mya Grenville orogeny during the final assembly of the supercontinent Rodinia, which ended an 800-million-year episode of convergent boundary tectonism.[2][3][4][5][6]