Pottsville Formation

Gray conglomerate, fine- to coarse-grained sandstone, and siltstone and shale containing minable anthracite coals. Includes three members, in descending order: Sharp Mountain--conglomerate and conglomeratic sandstone; Schuylkill--sandstone and conglomeratic sandstone; Tumbling Run--conglomeratic sandstone and sandstone.
State Pennsylvania
Name Pottsville Formation
Geologic age Pennsylvanian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)fine- to coarse-grained sandstone, Schuylkill--sandstone and conglomeratic sandstone; Tumbling Run--conglomeratic sandstone and sandstone.
Minor
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Coal > Anthracite (Bed)minable anthracite coals
Sedimentary > Clastic > Conglomerate (Bed)Sharp Mountain--conglomerate and conglomeratic sandstone
Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (Bed)Sharp Mountain--conglomerate and conglomeratic sandstone; Schuylkill--sandstone and conglomeratic sandstone; Tumbling Run--conglomeratic sandstone and sandstone.
References

Berg, T.M., Edmunds, W.E., Geyer, A.R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.

Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000.

NGMDB product
Counties Carbon - Columbia - Dauphin - Lackawanna - Lebanon - Luzerne - Northumberland - Schuylkill - Susquehanna - Wayne