Geologic units in Clark county, Kentucky

New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided (Devonian to Mississippian) at surface, covers 5 % of this area: New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
Lithology: black shale; dolostone (dolomite); limestone
Drakes Formation (Ordovician) at surface, covers 8 % of this area: Drakes Formation
Lithology: dolostone (dolomite); shale; limestone
Crab Orchard Formation and Brassfield Dolomite, undivided (Silurian) at surface, covers 5 % of this area: Crab Orchard Formation and Brassfield Dolomite, undivided; locally includes Bisher Dolomite in Estill County
Lithology: shale; dolostone (dolomite)
Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (Ordovician) at surface, covers 12 % of this area: Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
Lithology: limestone; shale; siltstone
Lexington Limestone (Ordovician) at surface, covers 45 % of this area: Lexington Limestone
Lithology: limestone; shale
High Bridge Group (Ordovician) at surface, covers 1 % of this area: High Bridge Group
Lithology: limestone; shale; dolostone (dolomite)
Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 24 % of this area: Garrard Siltstone and Kope and Clays Ferry Formations, undivided
Lithology: shale; limestone; siltstone