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Mississippi Alluvial and Southeast USA Coastal Plains 8.5.1: Middle Atlantic Coastal Plain 8.5.2: Mississippi Alluvial Plain: 8.5.3: Southern Coastal Plain 8.5.4: Atlantic Coastal Pine Barrens 9: Great Plains: 9.2: Temperate Prairies 9.2.1: Aspen Parkland/Northern Glaciated Plains: 9.2.2: Lake Manitoba and Lake Agassiz Plain 9.2.3: Western Corn ...
The Central Great Plains are a prairie ecoregion of the central United States, part of North American Great Plains. The region runs from west-central Texas through west-central Oklahoma, central Kansas, and south-central Nebraska. It is designated as the Central and Southern Mixed Grasslands ecoregion by the World Wide Fund for Nature.
The adjoining forests in Canada are generally referred to as the Mixedwood Plains Ecozone or the Great Lakes-St.Lawrence Forest Region. 32 Texas Blackland Prairies; 33 East Central Texas Plains; 34 Western Gulf Coastal Plain; 36 Ouachita Mountains; 37 Arkansas Valley; 38 Boston Mountains; 39 Ozark Highlands; 51 North Central Hardwood Forests ...
Subdividing the Eastern Temperate Forests, Arkansas is split among three Level II ecoregions: the Southeastern Plains, Ozark, Ouachita, Appalachian Forests, and the Mississippi Alluvial and Southeast USA Coastal Plains. Level III subdivides the continent into 182 ecoregions; of these, seven lay partly within Arkansas's borders.
The Springfield Plateau is the only Ozark Highland Level IV ecoregion within all four states. [1] The nearly level to rolling Springfield Plateau is underlain by cherty limestone of the Mississippian Boone Formation and Burlington Limestone; it is less rugged and wooded than Ecoregions 38, 39b, and 39c, and lacks the Ordovician dolomite and limestone of Ecoregions 39c and 39d.
Central and Southern Cascades forests; Central Appalachian dry oak–pine forest; Central forest–grasslands transition; Central Great Plains (ecoregion) Central Oklahoma/Texas Plains (ecoregion) Central Pacific coastal forests; Central Polynesian tropical moist forests; Central tall grasslands; Central U.S. hardwood forests; Chihuahuan Desert
Ecologically, the EPA includes the Cross Timbers as part of the vast Great Plains, which comprise Level I Ecoregion 9.0, stretching from central Alberta in Canada to northern Mexico. [6] More specifically, the Cross Timbers fall into Level II Ecoregion 9.4, the smaller South Central Semi-Arid Plains. [7]
The Northern Pleistocene Valley Trains ecoregion is a flat to irregular alluvial plain composed of sandy to gravelly glacial outwash overlain by alluvium; sand sheets, widespread in the St. Francis Lowlands (73c), are absent. The Pleistocene outwash deposits of Ecoregion 73b are usually coarser and better drained than the alluvial deposits of ...