Geologic units in Calloway county, Kentucky

Additional scientific data in this geographic area

Continental deposits and loess, undifferentiated (Tertiary to Quaternary) at surface, covers 59 % of this area

Continental deposits and loess, undifferentiated; West of the Tennessee River

Clayton and McNairy Formations, undivided (Paleocene to Upper Cretaceous) at surface, covers 17 % of this area

Clayton and McNairy Formations, undivided

Alluvium (Pleistocene to Holocene) at surface, covers 11 % of this area

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 (Mississippian) at surface, covers 3 % of this area

Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided

Jackson and Claiborne Formations, undivided (Tertiary) at surface, covers 3 % of this area

Jackson and Claiborne Formations, undivided; includes some rocks of Oligocene age

Porters Creek Clay (Paleocene) at surface, covers 3 % of this area

Porters Creek Clay

Warsaw Limestone (Mississippian) at surface, covers 2 % of this area

Warsaw Limestone; west of Christian County

Wilcox Formation (Eocene) at surface, covers 2 % of this area

Wilcox Formation

Ste. Genevieve and St. Louis Limestones, undivided (Mississippian) at surface, covers < 0.1 % of this area

Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County

Alluvial deposits (Quaternary) at surface, covers < 0.1 % of this area

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 and Chattanooga Shale (Mississippian) at surface, covers < 0.1 % of this area

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.