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Mineral Resources > Online Spatial Data > Geology > by state > Kentucky Geology

Geologic units in Madison county, Kentucky

Drakes Formation (Ordovician) at surface, covers 20 % of this area

Drakes Formation

Lithology: dolostone (dolomite); shale; limestone

Pennington Formation and Newman Limestone (Mississippian) at surface, covers 1.0 % of this area

Pennington Formation and Newman Limestone; includes Carter Caves Sandstone in Carter County and vicinity

Lithology: limestone; dolostone (dolomite); shale; sandstone

New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided (Devonian to Mississippian) at surface, covers 12 % of this area

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

Lithology: black shale; dolostone (dolomite); limestone

Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided (Mississippian) at surface, covers 0.1 % of this area

Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided

Lithology: limestone; dolostone (dolomite); shale; sandstone

Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided (Ordovician) at surface, covers 31 % of this area

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

Lithology: limestone; shale; siltstone

Crab Orchard Formation and Brassfield Dolomite, undivided (Silurian) at surface, covers 10 % of this area

Crab Orchard Formation and Brassfield Dolomite, undivided; locally includes Bisher Dolomite in Estill County

Lithology: shale; dolostone (dolomite)

Breathitt Formation, lower part (Pennsylvanian) at surface, covers 0.5 % of this area

Breathitt Formation, lower part; lower part which includes Livingston Conglomerate Member of Lee Formation in eastern Rockcastle County

Lithology: shale; siltstone; sandstone; coal; conglomerate

Wildie, Nada, Halls Gap, Holtsclaw Siltstone, Cowbell, Nancy, Kenwood Siltstone, New Providence Shale, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Borden Formation locally includes Renfro Member in eastern Kentucky (Devonian to Mississippian) at surface, covers 5 % of this area

Wildie, Nada, Halls Gap, Holtsclaw Siltstone, Cowbell, Nancy, Kenwood Siltstone, New Providence Shale, Sunbury Shale, Berea Sandstone, and Bedford Shale, undivided; Borden Formation locally includes Renfro Member in eastern Kentucky

Lithology: shale; siltstone; sandstone

Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 16 % of this area

Garrard Siltstone and Kope and Clays Ferry Formations, undivided

Lithology: shale; limestone; siltstone

High Bridge Group (Ordovician) at surface, covers 0.4 % of this area

High Bridge Group

Lithology: limestone; shale; dolostone (dolomite)

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

Lexington Limestone

Lithology: limestone; shale