Geologic units in Henry county, Kentucky

Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided (Silurian) at surface, covers 0.3 % of this area: Laurel Dolomite, Osgood Formation, and Brassfield Dolomite, undivided
Lithology: dolostone (dolomite); shale
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
Drakes Formation (Ordovician) at surface, covers 13 % of this area: Drakes Formation
Lithology: dolostone (dolomite); shale; limestone
Lexington Limestone (Ordovician) at surface, covers 5 % of this area: Lexington Limestone
Lithology: limestone; shale
Garrard Siltstone and Kope and Clays Ferry Formations, undivided (Ordovician) at surface, covers 23 % of this area: Garrard Siltstone and Kope and Clays Ferry Formations, undivided
Lithology: shale; limestone; siltstone
Bull Fork Formation (Ordovician) at surface, covers 22 % of this area: Bull Fork Formation
Lithology: limestone; shale
Alluvium (Pleistocene to Holocene) at surface, covers 6 % of this area: Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks
Lithology: sand; silt; glacial drift