Pottsville Formation (lower part)

Light-gray thick-bedded to massive pebbly quartzose sandstone, containing varying amounts of interbedded dark-gray shale, siltstone, and thin discontinuos coal. The Boyles Sandstone Member is a formally named unit in the lower part of the formation. Top of unit is mapped at the Black Creek coal.
State Alabama
Name Pottsville Formation (lower part)
Geologic age Pennsylvanian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)Light-gray thick-bedded to massive pebbly quartzose sandstone
Minor
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Incidental
Sedimentary > Coal (Bed)
Comments Note: Printed map uses unit symbol 'Ppv1l'; digital map uses 'Ppv11(one)'.
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 - Cullman - Etowah - Franklin - Jefferson - Lamar - Lawrence - Marion - Marshall - Morgan - Tuscaloosa - Walker - Winston