Tuscumbia Limestone

Light-gray limestone, partly oolitic near top; fine to very coarse-grained bioclastic crinoidal limestone common; light-gray chert nodules and concretions are scattered throughout and are abundant locally. The apparent thickness of the formation in this province varies due to differential dissolution of the carbonate in the unit.
State Alabama
Name Tuscumbia Limestone
Geologic age Mississippian
Lithologic constituents
Major
Sedimentary > Carbonate > LimestoneLight-gray limestone, partly oolitic near top; fine to very coarse-grained bioclastic crinoidal limestone common.
Minor
Sedimentary > Chemical > Chertlight-gray chert nodules and concretions are scattered throughout and are abundant locally
References

Szabo, M.W., Osborne, E.W., Copeland, C.W. Jr., and Neathery, T.L., 1988, Geologic Map of Alabama, Geological Survey of Alabama Special Map 220, scale 1:250,000.

NGMDB product
Counties Colbert - Lauderdale - Lawrence - Limestone - Madison - Marshall - Morgan