Geologic units in Lyon county, Kentucky

Continental deposits, undifferentiated (Tertiary to Quaternary) at surface, covers 7 % of this area: Continental deposits, undifferentiated; East of the Tennessee River
Lithology: sand; gravel;
Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided (Mississippian) at surface, covers 2 % of this area: Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided
Lithology: limestone; dolostone (dolomite); shale; sandstone
Tuscaloosa Formation (Upper Cretaceous) at surface, covers 12 % of this area: Tuscaloosa Formation
Lithology: conglomerate; gravel
Warsaw Limestone (Mississippian) at surface, covers 7 % of this area: Warsaw Limestone; west of Christian County
Lithology: limestone
Ste. Genevieve and St. Louis Limestones, undivided (Mississippian) at surface, covers 50 % of this area: Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County
Lithology: limestone; dolostone (dolomite); chert; sandstone
Alluvium (Pleistocene to Holocene) at surface, covers 4 % of this area: Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks
Lithology: sand; silt; glacial drift