Little Oak Limestone

Dark-gray medium to thick-bedded fossiliferous, argillaceous to silty limestone containing chert nodules. Locally includes thin beds of bentonite in the upper part.
State Alabama
Name Little Oak Limestone
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)dark-gray medium to thick-bedded fossiliferous, argillaceous to silty limestone
Minor
Sedimentary > Chemical > Chertchert nodules
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)
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 Calhoun - Saint Clair - Shelby