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Geologic units in Marion county, Kentucky

Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided (Silurian) at surface, covers 6 % of this area
Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
Lithology: dolostone (dolomite); shale
Renfro and Muldraugh Members of Borden Formation and Fort Payne Formation, undivided (Mississippian) at surface, covers 5 % 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 12 % of this area
Ashlock Formation, Grant Lake and Calloway Creek Limestones, and Fairview Formation, undivided
Lithology: limestone; shale; siltstone
New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided (Devonian to Mississippian) at surface, covers 26 % of this area
New Albany, Chattanooga, and Ohio Shales, Boyle Dolomite (Limestone), and Sellersburg Limestone, undivided
Lithology: black shale; dolostone (dolomite); limestone
Salem, Warsaw, and Harrodsburg Limestones, undivided (Mississippian) at surface, covers 4 % of this area
Salem, Warsaw, and Harrodsburg Limestones, undivided
Lithology: limestone; fine-grained mixed clastic; dolostone (dolomite)
Drakes Formation (Ordovician) at surface, covers 17 % of this area
Drakes Formation
Lithology: dolostone (dolomite); shale; limestone
Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided (Ordovician) at surface, covers 9 % of this area
Drakes Formation and Grant Lake and Calloway Creek Limestones, undivided; in Boyle, Casey, and Marion Counties
Lithology: limestone; dolostone (dolomite); shale
Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 5 % of this area
Garrard Siltstone and Kope and Clays Ferry Formations, undivided
Lithology: shale; limestone; siltstone
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 16 % 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
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
Lithology: sand; silt; glacial drift
Ste. Genevieve and St. Louis Limestones, undivided (Mississippian) at surface, covers 0.4 % of this area
Ste. Genevieve and St. Louis Limestones, undivided; includes Salem Limestone west of Christian County
Lithology: limestone; dolostone (dolomite); chert; sandstone

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