Geologic units in Pendleton county, Kentucky

Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 78 % of this area

Garrard Siltstone and Kope and Clays Ferry Formations, undivided

Alluvium (Pleistocene to Holocene) at surface, covers 10 % of this area

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks

Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (Ordovician) at surface, covers 10 % of this area

Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided

Lexington Limestone (Ordovician) at surface, covers 2 % of this area

Lexington Limestone

Point Pleasant Formation (Ordovician) at surface, covers < 0.1 % of this area

Limestone (60%) and shale (40%) interbedded; gray to bluish gray weathers light gray; planar to lenticular, thin to medium bedded; 0 to 80 feet thick.