Geologic units in Bracken county, Kentucky

Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 63 % of this area

Garrard Siltstone and Kope and Clays Ferry Formations, undivided

Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (Ordovician) at surface, covers 30 % of this area

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

Lexington Limestone (Ordovician) at surface, covers 4 % of this area

Lexington Limestone

Alluvium (Pleistocene to Holocene) at surface, covers 3 % of this area

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

Point Pleasant Formation (Ordovician) at surface, covers 0.5 % 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.

Glacial deposits, undifferentiated (Pleistocene to Holocene) at surface, covers < 0.1 % of this area

Glacial deposits, undifferentiated; shown locally