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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). [1] The plain is divided into (a) the Mississippi River Delta in the southern half of ...
The shifting river delta at the mouth of the Mississippi on the Gulf Coast lies some 300 miles south of this area in Louisiana, and is referred to as the Mississippi River Delta. Rather, the Mississippi Delta is part of an alluvial plain, created by regular flooding of the Mississippi and Yazoo rivers over thousands of years. The climate is ...
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 .
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 Mississippi embayment is a physiographic feature in the south-central United States, part of the Mississippi Alluvial Plain. It is essentially a northward continuation of the fluvial sediments of the Mississippi River Delta to its confluence with the Ohio River at Cairo, Illinois .
Use of "alluvial plain" as a general, informal term for a broad flood plain or a low-gradient delta is explicitly discouraged. The NCSS glossary instead suggests "flood plain". [1] Alluvial plains have similar traits to a river delta; however, the river delta will flow into a larger body of water. Alluvial plains generally lack this.
The third region, the lowlands of the south-east and part of the Mississippi Alluvial Plain, has an area of some 3,000-square-mile (7,800 km 2). It is an undulating country, for the most part well drained, but swampy in its lowest portions.
It is part of the Mississippi embayment, itself part of the Mississippi River Alluvial Plain. [2] The flat plain is bisected by Crowley's Ridge , a narrow band of rolling hills rising 250 to 500 feet (76 to 152 m) above the flat delta plains.