Continental deposits and loess, undifferentiated; West of the Tennessee River
Clayton and McNairy Formations, undivided
Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks
Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
Jackson and Claiborne Formations, undivided; includes some rocks of Oligocene age
Porters Creek Clay
Warsaw Limestone; west of Christian County
Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County
Sand, silt, clay, and gravel. In flood plain of Mississippi River more than 100 feet thick; in smaller streams generally less than 20 feet thick.
Fort Payne Formation - Bedded chert and calcereous and dolomitic silicastone; minor coarse-grained limestone and shale. Thin green shale (Maury) at base. Thickness about 200 feet. Chattanooga Shale - Black carbonaceous shale, fissile. Thickness 0 to 70 feet.