Mississippi Alluvial Plain

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Mississippi Delta
Mississippi River Delta
Mississippi embayment
Mississippi River-Gulf Outlet Canal Mississippi delta disambig.svg

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 Louisiana and (b) the upper Mississippi Embayment running from central Louisiana to Illinois. [2]

The term "Mississippi embayment" is sometimes used more narrowly to refer to its section on the western side of the river, running through eastern Arkansas, southeastern Missouri, westernmost Tennessee (east side of the River), westernmost Kentucky (east side of the River) and southernmost Illinois, and excluding northwest Mississippi where the alluvial plain is known as the Mississippi Delta.

It is the largest ecoregion of Louisiana, covering 12,350 square miles (32,000 km2), and including all of the historic Mississippi River floodplain in the state.

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The Mississippi River is the primary river, and second-longest river, of the largest drainage basin in the United States. From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for 2,340 miles (3,766 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky and Appalachian mountains. The main stem is entirely within the United States; the total drainage basin is 1,151,000 sq mi (2,980,000 km2), of which only about one percent is in Canada. The Mississippi ranks as the thirteenth-largest river by discharge in the world. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.

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<span class="mw-page-title-main">Crowley's Ridge</span> Geological formation in the U.S. states of Arkansas and Missouri

Crowley's 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. It is the most prominent feature in the Mississippi Alluvial Plain between Cape Girardeau, Missouri, and the Gulf of Mexico.

<span class="mw-page-title-main">Missouri Bootheel</span> Place

The Missouri Bootheel is a salient (protrusion) located in the southeasternmost part of the U.S. state of Missouri, extending south of 36°30′ north latitude, so called because its shape in relation to the rest of the state resembles the heel of a boot. Strictly speaking, it is composed of some or all of the counties of Dunklin, New Madrid, and Pemiscot. However, the term is locally used to refer to the entire southeastern lowlands of Missouri located within the Mississippi Embayment, which includes parts of Butler, Mississippi, Ripley, Scott, Stoddard and extreme southern portions of Cape Girardeau and Bollinger counties. The largest city in the region is Kennett.

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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. The current sedimentary area was formed in the Cretaceous and early Cenozoic by the filling with sediment of a pre-existing basin. An explanation for the embayment's formation was put forward by Van Arsdale and Cox in 2007: movement of the Earth's crust brought this region over a volcanic "hotspot" in the Earth's mantle causing an upthrust of magma which formed the Appalachian-Ouachita range. Subsequent erosion caused a deep trough that was flooded by the Gulf of Mexico and eventually filled with sediment from the Mississippi River.

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Mississippi Delta may refer to:

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The Delta Regional Authority (DRA) is a Federal-State partnership whose mission it is to improve the quality of life for the residents of the Mississippi Delta. The Delta Regional Authority serves 252 counties and parishes in parts of eight states: Alabama, Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, and Tennessee. Led by a Federal Co-Chairman appointed by the President and the governors of the eight states, the DRA fosters partnerships throughout the region as it works to improve the Delta economy. DRA funds can be used to leverage other federal and state programs.

<span class="mw-page-title-main">Bantam sunfish</span> Species of fish

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<span class="mw-page-title-main">Bois Brule Bottom</span> Alluvial floodplain in the American state of Missouri

The Bois Brule Bottom is an alluvial floodplain in Bois Brule Township in Perry County, Missouri stretching between Bois Brule Creek to the west and the Mississippi River to the east.

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.

References

  1. Alhassan, Mustapha; Lawrence, Collin B.; Richardson, Steven; Pindilli, Emily J. (2019). "The Mississippi Alluvial Plain aquifers—An engine for economic activity". Fact Sheet. doi:10.3133/fs20193003. S2CID   133901670.
  2. Dale, Edward E.; Ware, Stewart; Waitman, Ben (June 2007). "Ordination and Classification of Bottomland Forests in the Lower Mississippi Alluvial Plain". Castanea. 72 (2): 105–115. doi:10.2179/0008-7475(2007)72[105:OACOBF]2.0.CO;2. ISSN   0008-7475. S2CID   86232272.

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