Jackson and Claiborne Formations, undivided

Jackson and Claiborne Formations, undivided; includes some rocks of Oligocene age
State Kentucky
Name Jackson and Claiborne Formations, undivided
Geologic age Tertiary
Lithologic constituents
Major
Sedimentary > Clastic > Sandstonelithologies and lithology percentages estimated from stratigraphic column on paper source map; combined units estimated at about 45% sandstone, 40 % siltstone, and 15% shale
Sedimentary > Clastic > Siltstonelithologies and lithology percentages estimated from stratigraphic column on paper source map; combined units estimated at about 45% sandstone, 40 % siltstone, and 15% shale
Minor
Sedimentary > Clastic > Mudstone > Shalelithologies and lithology percentages estimated from stratigraphic column on paper source map; combined units estimated at about 45% sandstone, 40 % siltstone, and 15% shale
Comments in Jackson Purchase; combined thickness ranges from 22-165 m
References

Noger, M.C., compiler, 1988, Geologic map of Kentucky: sesquicenntennial edition of the Kentucky Geological Survey: U.S. Geological Survey and the Kentucky Geological Survey, scale 1:500,000.

NGMDB product
Counties Ballard - Calloway - Carlisle - Fulton - Graves - Hickman - McCracken - Marshall