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Ouachita orogeny
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Ouachita orogeny

geology
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Article History

Ouachita orogeny, a mountain-building event that resulted in the folding and faulting of exposed strata in the Ouachita Geosyncline in the southern portion of the United States in Arkansas, Oklahoma, and the Marathon uplift region of West Texas. The deformation is Late Paleozoic in age, probably culminating between the Late Carboniferous and the Early Permian (about 318 million to 271 million years ago). The orogeny resulted in a northward and westward compression in the geosynclinal strata onto adjacent platform rocks.

This article was most recently revised and updated by Richard Pallardy.