Pottsville Formation

Light-gray thin to thick-bedded quartzose sandstone and conglomerate containing interbedded dark-gray shale, siltstone, and coal. Mapped on Lookout Mountain, Blount and Chandler Mountains, and Sand Mountain northeats of Blount County, and on the mountains of Jackson, Marshall and Madison Counties north and west of the TN river.
State Alabama
Name Pottsville Formation
Geologic age Pennsylvanian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)Light-gray thin to thick-bedded quartzose sandstone
Sedimentary > Clastic > Conglomerate (Bed)conglomerate containing interbedded dark-gray shale, siltstone, and coal.
Minor
Sedimentary > Coal (Bed)conglomerate containing interbedded dark-gray shale, siltstone, and coal.
Sedimentary > Clastic > Mudstone > Shale (Bed)conglomerate containing interbedded dark-gray shale, siltstone, and coal.
Sedimentary > Clastic > Siltstone (Bed)conglomerate containing interbedded dark-gray shale, siltstone, and coal.
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 Blount - Cherokee - DeKalb - Etowah - Jackson - Jefferson - Madison - Marshall - Saint Clair