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The Ouachita Mountains (/ ˈ w ɒ ʃ ɪ t ɔː /), simply referred to as the Ouachitas, are a mountain range in western Arkansas and southeastern Oklahoma. They are formed by a thick succession of highly deformed Paleozoic strata constituting the Ouachita Fold and Thrust Belt, one of the important orogenic belts of North America . [ 3 ]
The Ouachita Mountains to the south rise a few hundred feet higher, but are not geographically associated with the Ozarks. The Boston Mountains portion of the Ozarks extends north of the Arkansas River Valley 20 to 35 miles (32 to 56 km), is approximately 200 miles (320 km) long, [20] and is bordered by the Springfield and Salem Plateau to the ...
The Ozark Mountain forests have been subdivided into the Ozark National Forest, St. Francis National Forest, and the Ouachita National Forest, maintained by the United States Forest Service. [33] [34] The Forest Service also maintains the Black Fork Mountain Wilderness, Blanchard Springs Caverns, and several other recreational areas within the ...
There are three distinct mountain ranges within the U.S. Interior Highlands: The Ouachita Mountains of Arkansas and Oklahoma, which can be divided into a number of subranges including the mountains of the Arkansas River Valley (called the Frontal Ouachita Mountains); the highest point is Mount Magazine at 2,753 ft (839 m).
The level III ecoregions in Arkansas are the South Central Plains (35), Ouachita Mountains (36), Arkansas Valley (37), Boston Mountains (38), Ozark Highlands (39), Mississippi Alluvial Plain (73), Mississippi Valley Loess Plains (74). (Compare to map of Level IV ecoregions.)
The Ozark and Ouachita (pronounced Oh-Wa-Sheet-ah) Mountains rise from west to east over the state's eastern third, gradually increasing in elevation in an eastward direction. [7] [9] Oklahoma had few natural lakes. Those that did exist were either oxbow or playa lakes. Oklahoma has sixty-two oxbow lakes above 10 acres (0.040 km 2) in size.
The News-Leader compiled a list of 10 spots throughout the Ozarks, including Missouri State University and Dogwood Canyon, with the best fall foliage.
It is one of the Ozark Plateaus; some folding and faulting has occurred but, in general, strata are much less deformed than in the Ouachita Mountains. Maximum elevations are higher, soils have a warmer temperature regime, and carbonate rocks are much less extensive than in the Ozark Highlands. Physiography is distinct from the Arkansas Valley.