USGS Home
Contact USGS
Search USGS

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

Geologic units in Union county, Kentucky

[Additional scientific data in this geographic area]

Bond Formation (Pennsylvanian) at surface, covers < 0.1 % of this area

Bond Formation - Mostly shale and sandstone; also includes thin beds of limestone and coal

Lithology: shale; sandstone; limestone; coal

Abbott Formation (Pennsylvanian) at surface, covers < 0.1 % of this area

Abbott Formation

Lithology: sandstone; shale; clay or mud; coal

Alluvium (Pleistocene to Holocene) at surface, covers 44 % of this area

Alluvium; includes glacial deposits along the Ohio River and its tributaries west of Cannelton locks

Lithology: sand; silt; glacial drift

Modesto Formation (Pennsylvanian) at surface, covers < 0.1 % of this area

Modesto Formation

Lithology: shale; sandstone; limestone; clay or mud; coal; black shale

Sturgis Formation (Middle to Upper Pennsylvanian) at surface, covers 43 % of this area

Sturgis Formation

Lithology: siltstone; sandstone; shale; limestone; coal

Caseyville Formation (Lower to Middle Pennsylvanian) at surface, covers 2 % of this area

Caseyville Formation

Lithology: siltstone; sandstone; conglomerate; shale; coal

Tradewater Formation (Middle Pennsylvanian) at surface, covers 3 % of this area

Tradewater Formation

Lithology: siltstone; sandstone; limestone; coal

Patoka and Shelburn Formations (Pennsylvanian) at surface, covers 0.2 % of this area

Patoka and Shelburn Formations - Mostly shale and sandstone; also includes thin beds of limestone and coal. WF, top of West Franklin member

Lithology: shale; sandstone; limestone; coal

Mauzy Formation (Lower Permian) at surface, covers 0.1 % of this area

Mauzy Formation

Lithology: siltstone; sandstone; limestone

Carbondale Formation (Middle Pennsylvanian) at surface, covers 2 % of this area

Carbondale Formation

Lithology: siltstone; sandstone; shale; coal

Caseyville Formation (Pennsylvanian) at surface, covers < 0.1 % of this area

Caseyville

Lithology: sandstone; shale; coal; claystone; gravel

Upper Chesterian (Grove Church - Tar Springs) Series (Mississippian) at surface, covers < 0.1 % of this area

Upper Chesterian (Grove Church - Tar Springs) Series

Lithology: sandstone; shale; limestone; chert; coal