Frog Mountain Sandstone

Light to dark-gray sandstone with thin dark-gray shale interbeds, light-gray to black dolomudstone, glauconitic limestone, and fossiliferous chert locally in lower part.
State Alabama
Name Frog Mountain Sandstone
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)thin dark-gray shale interbeds
Incidental
Sedimentary > Clastic > Mudstone (Bed)light-gray to black dolomudstone
Sedimentary > Carbonate > Limestone (Bed, Glauconitic)glauconitic limestone
Sedimentary > Chemical > Chert (Bed)fossiliferous chert
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 - Cherokee