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The Arkansas Timberlands (sometimes also called Southern Arkansas or Southwest Arkansas) is a region of the U.S. state of Arkansas generally encompassing the area south of the Ouachita Mountains, south of Central Arkansas and west of the Arkansas Delta.
Crowley's Ridge (also Crowleys Ridge) is a geological formation that rises 250 to 550 feet (170 m) above the alluvial plain of the Mississippi embayment in a 150-mile (240 km) line from southeastern Missouri to the Mississippi River near Helena, Arkansas.
The Arkansas River enters the state near Van Buren and flows southeast through Little Rock to empty into the Mississippi River near Arkansas Post. Most of the river serves barge traffic to Tulsa, Oklahoma, as the McClellan–Kerr Arkansas River Navigation System. [3] Through south Arkansas, the Ouachita River and the Saline River run roughly ...
Arkansas is ecologically diverse. Though often simplistically split into halves from southwest to northeast, with "uplands" in the northwest half and "lowlands" in the southeastern half, the CEC system of levels reveals the diverse forests and floodplains, prairies and plateaus, ridges and river bottoms, and loess hills and lowlands of Arkansas ...
Pine forest near Lake Winona (Arkansas); part of Ouachita National Forest. Mammoth Spring: 1972: Fulton: State The largest first magnitude spring in Arkansas, it is connected underground to the Grand Gulf State Park in Missouri. Roaring Branch Research Natural Area
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Xeric or desert scrublands occur in the world's deserts and xeric shrublands ecoregions or in fast-draining sandy soils in more humid regions. These scrublands are characterized by plants with adaptations to the dry climate, which include small leaves to limit water loss, thorns to protect them from grazing animals, succulent leaves or stems ...
The Felsenthal National Wildlife Refuge (NWR) is a 76,000 acre (307.56 km 2) national wildlife refuge located in south-central Arkansas in Ashley, Bradley, and Union counties. Felsenthal NWR is one of three refuges forming an administrative complex, which also includes Pond Creek NWR to the northwest and Overflow NWR to the east. [2]