Lower members of Gatesburg Formation, undivided

Includes, in descending order: cyclic repetitions of sandstone and dolomite ("upper sandstone'' member); fossiliferous, laminated to massive limestone and dolomite (Ore Hill Member); cyclic repetitions of sandstone and dolomite (''lower sandstone" member); and thick-bedded crystalline dolomite (Stacy Member).
State Pennsylvania
Name Lower members of Gatesburg Formation, undivided
Geologic age Cambrian
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)includes, in descending order: cyclic repetitions of sandstone and dolomite ("upper sandstone'' member); fossiliferous, laminated to massive limestone and dolomite (Ore Hill Member); cyclic repetitions of sandstone and dolomite (''lower sandstone" member); and thick-bedded crystalline dolomite (Stacy Member).
Minor
Sedimentary > Clastic > Sandstone (Bed)cyclic repetitions of sandstone and dolomite (""upper sandstone'' member); cyclic repetitions of sandstone and dolomite (''lower sandstone"" member)
Sedimentary > Carbonate > Limestone (Bed)fossiliferous, laminated to massive limestone and dolomite (Ore Hill Member)
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 Centre - Huntingdon