Geologic units in Washington county, Kentucky

Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 54 % 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 35 % of this area

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

Drakes Formation (Ordovician) at surface, covers 9 % of this area

Drakes Formation

Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided (Silurian) at surface, covers 1 % of this area

Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided

Lexington Limestone (Ordovician) at surface, covers 0.5 % of this area

Lexington Limestone

New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided (Devonian to Mississippian) at surface, covers 0.2 % of this area

New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided