Columbus Limestone

Limestone and dolomite; gray to brown, weathers brown; massive bedding; upper 2/3 fossiliferous, gray limestone, lower 1/3 brown dolomite; 0 to 105 feet thick.
State Ohio
Name Columbus Limestone
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)gray to brown, weathers brown; massive bedding; upper 2/3 fossiliferous, gray limestone; 0 to 105 feet thick.
Minor
Sedimentary > Carbonate > Dolostone (Bed)lower 1/3 brown dolomite
References

Slucher, E.R., (principal compiler), Swinford, E.M., Larsen, G.E., and others, with GIS production and cartography by Powers, D.M., 2006, Bedrock geologic map of Ohio: Ohio Division of Geological Survey Map BG-1, version 6.0, scale 1:500,000.

NGMDB product
Counties Crawford - Delaware - Erie - Franklin - Huron - Madison - Marion - Ottawa - Pickaway - Sandusky - Seneca - Union - Wyandot