Pottsville Formation (lower part) (ALPApv2l;4)

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. In both the Cahaba and Coosa synclinoria the members in descending order include: the Pine Sandstone Member and the Shades Sandstone Member. Top of unit is mapped at top of Pine Sandstone Member.

State	Alabama
Name	Pottsville Formation (lower part)
Geologic age	Pennsylvanian
Lithologic constituents	Major Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Sandstone (Bed) Incidental Sedimentary > Coal (Bed)
Comments	Note: Printed map uses unit symbol 'Ppv2l'; digital map uses 'Ppv21(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	NGMDB product page for 55859
Counties	Bibb - Calhoun - Jefferson - Saint Clair - Shelby

Pottsville Formation (lower part)

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.