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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 Mississippi River Alluvial Plain is an alluvial plain created by the Mississippi River on which lie parts of seven U.S. states, from southern Louisiana to southern Illinois (Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, Louisiana).
The Mississippi Alluvial Plain is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in seven U.S. states, though predominantly in Arkansas, Louisiana, and Mississippi. It parallels the Mississippi River from the Midwestern United States to the Gulf of Mexico.
The Arkansas Delta is one of the six natural regions of the state of Arkansas. Willard B. Gatewood Jr., ... itself part of the Mississippi River Alluvial Plain. [2]
Consequently, the Mississippi Alluvial Plain (or the Arkansas Delta) runs well into the city with Bayou Bartholomew picking up the western border as a line of demarcation between the Arkansas Delta and the Arkansas Timberlands. [citation needed] A series of levees and dams surrounds the area to provide for flood control and protect from channel ...
The Arkansas Delta is a subregion of the Mississippi Alluvial Plain, which is a flat area consisting of rich, fertile sediment deposits from the Mississippi River between Louisiana and Illinois. The county is often described as being within the Grand Prairie , a subdivision of the Arkansas Delta known today for rice farming and aquaculture ...
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 southeastern part of Arkansas along the Mississippi Alluvial Plain is sometimes called the Arkansas Delta. This region is a flat landscape of rich alluvial soils formed by repeated flooding of the adjacent Mississippi. Farther from the river, in the southeastern part of the state, the Grand Prairie has a more undulating landscape.