Ouachita orogeny

The Ouachita Mountains lie south of the Arkansas River valley which separates them from the Ozark plateau.

The Ouachita orogeny was a mountain building event that resulted in the folding and faulting of strata currently exposed in the Ouachita Mountains. The more extensive Ouachita system extends from the current range in Arkansas and Oklahoma southeast to the Black Warrior Basin in Alabama and to the southwest through the Llano, Marathon, and Solitario uplifts in Texas on into Coahuila and Chihuahua in Mexico.^[1]

The region during the early Paleozoic lay off the coast of the southern portion of Laurentia, in what is now the southern United States. Laurentia straddled the equator at the time and the Rheic Ocean was to the south of Laurentia. Through the Ordovician, Silurian, Devonian, and early Carboniferous, marine sedimentation left extensive deposits of black shale, quartzose sandstone, and chert beds. During the Mississippian a flysch sequence with dark shales and graywackes was deposited. Lenses of silicic tuff exist as evidence of limited volcanism.^[1]

These later sediments were formed over a subduction zone which formed along southern Laurentia as South America collided with Laurentia as it moved northward. The collision compressed and uplifted the region to form the Ouachita Mountains. The Ouachita Mountains during Permian to the Jurassic were extensively eroded. Much of the Ouachita system was buried beneath Mesozoic and Cenozoic sediments to the southeast and southwest. The structures there have only been revealed through deep drilling in petroleum exploration.

References

1. ^ ^{a b} http://www.du.edu/~jcalvert/geol/ouach.htm The Ouachita System

This tectonics article is a stub. You can help Wikipedia by expanding it.v · Categories: Ouachita Mountains Orogeny Carboniferous Geology of the United States Geology of Arkansas Geology of Oklahoma Tectonics stubs Wikimedia Foundation. 2010. Игры ⚽ Нужна курсовая? History of cricket in the West Indies from 1970-71 to 1980 Machel Montano Look at other dictionaries: Ouachita orogeny — ▪ geology       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.… …   Universalium Ouachita Mountains — topographic map …   Wikipedia Ouachita — may refer to: In geography: Ouachita Mountains Ouachita orogeny the geologic event that raised the Ouachita Mountains Ouachita River Ouachita Parish, Louisiana Ouachita County, Arkansas Ouachita National Forest Ouachita National Recreation Trail… …   Wikipedia Ouachita Geosyncline — ▪ geology       a linear trough in the Earth s crust in which rocks of the Paleozoic Era (from 251,000,000 to 542,000,000 years ago) were deposited along the southern margin of North America, from Mississippi to eastern Mexico. Most of the belt… …   Universalium Ouachita geosyncline — The Ouachita geosyncline is a major fold ralong southern North America. It is mostly covered by sediment from the Mississippian and later, but it outcrops in the Austin, Texas region, spanning Oklahoma and Arkansas, where it forms the Ouachita… …   Wikipedia Variscan orogeny — The Variscan (or Hercynian) orogeny is a geologic mountain building event caused by Late Paleozoic continental collision between Laurasia and Gondwana to form the supercontinent of Pangea.NamingThe name, Variscan , comes from the Medieval Latin… …   Wikipedia North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium Carboniferous Period — Interval of geologic time 354–290 million years ago, marked by great changes in world geography. All the landmasses drew closer together as a result of tectonic plate movements. The supercontinent Gondwana occupied much of the Southern Hemisphere …   Universalium Permian Basin — ▪ area, Texas, United States also called  West Texas Basin   large sedimentary basin in western Texas and southeastern New Mexico, U.S., noted for its rich petroleum, natural gas, and potassium deposits. Due to its economic importance, it is one… …   Universalium Wichita Mountains — Range Elk Mountain, in the eastern Wichita Mountains …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”