St. Paul Group

Very finely crystalline, "birdseye" limestone at top and base, granular fossiliferous limestone, black chert, and dolomite in middle.
State Pennsylvania
Name St. Paul Group
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)very finely crystalline, "birdseye" limestone at top and base, granular fossiliferous limestone in middle
Minor
Sedimentary > Chemical > Chert (Bed)granular fossiliferous limestone, black chert, and dolomite in middle
Sedimentary > Carbonate > Dolostone (Bed)granular fossiliferous limestone, black chert, and dolomite in middle
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 Cumberland - Dauphin - Franklin - York