Athens Shale

Black graptolitic shale, locally contains interbedded dark-gray limestone.
State Alabama
Name Athens Shale
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)black graptolitic shale
Minor
Sedimentary > Carbonate > Limestone (Bed)
Comments Note: Printed map uses unit symbol 'Oa'; digital map uses 'ORa'.
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 - Shelby - Talladega