Geologic units in Grant county, Kentucky

Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 73 % 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 22 % of this area

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

Lexington Limestone (Ordovician) at surface, covers 3 % of this area

Lexington Limestone

Alluvium (Pleistocene to Holocene) at surface, covers 2 % of this area

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

Bull Fork Formation (Ordovician) at surface, covers < 0.1 % of this area

Bull Fork Formation