Gray and brown silt, silty clay, some very fine sand, reddish brown along the Red River.
Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.
Loam, sand, gravel, and clay; mapped only in Mississippi River Alluvial Plain.
Light gray, tan and brown fine to coarse sand; some clay silt and gravel. Overlain by 1-9 meters of loess.
Chickasawhay limestone, sandy limestone, and sand, present only in eastern MS (mapped with it is the overlying Paynes Hammock sand of Miocene age); Vicksburg group, predominantly limestone and marl, but contains some bentonite and near the top, chocolate-colored clay and some sand.