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The 'Mississippi River Alluvial Plain', occupies parts of seven states, from southern Louisiana to southern Illinois. The northern portion in eastern Arkansas, southeastern Missouri, westernmost Tennessee, westernmost Kentucky and southern Illinois is referred to as the Mississippi embayment. It is the largest ecoregion of Louisiana, covering 12,350 square miles, and including all of the historic Mississippi River floodplain.
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★ Crittenden County Open Portal Website