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AGS / Education / Geology Resources / Physiographic Regions / Mississippi River Alluvial Plain

The Mississippi River Alluvial Plain is a relatively level plain with elevations varying between 100-300 feet except for Crowley’s Ridge with some of its highest points reaching 400-560 feet.  This region contains mostly unconsolidated sediments such as sand, clay, silt, gravel and loess.  To learn more about the geology click here.

See Mississippi Plain on map

View of flat-lyin alluvial plain

View of flat-lying alluvial plain

Loess canyon on Crowleys Ridge

Loess canyon on Crowley’s Ridge

Learn about the Geology of the Mississippi River Alluvial Plain forward arrow

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Arkansas Geological Survey
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