Geologic units in Muhlenberg county, Kentucky

Carbondale Formation (Middle Pennsylvanian) at surface, covers 20 % of this area: Carbondale Formation
Lithology: siltstone; sandstone; shale; coal
Rocks of Chesterian age, upper part (Upper Mississippian) at surface, covers 4 % of this area: Rocks of Chesterian age, upper part
Lithology: shale; limestone; siltstone; sandstone; chert
Sturgis Formation (Middle to Upper Pennsylvanian) at surface, covers 26 % of this area: Sturgis Formation
Lithology: siltstone; sandstone; shale; limestone; coal
Alluvium (Pleistocene to Holocene) at surface, covers 18 % of this area: Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks
Lithology: sand; silt; glacial drift
Tradewater Formation (Middle Pennsylvanian) at surface, covers 15 % of this area: Tradewater Formation
Lithology: siltstone; sandstone; limestone; coal
Caseyville Formation (Lower to Middle Pennsylvanian) at surface, covers 17 % of this area: Caseyville Formation
Lithology: siltstone; sandstone; conglomerate; shale; coal