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.
View of flat-lying alluvial plain
Loess canyon on Crowley’s Ridge