Ridgeley Formation through Coeymans Formation, undivided

In descending order: Ridgeley Formation--white siliceous sandstone; Shriver Chert--gray siltstone and shale and dark-gray chert; Port Ewen Shale--dark-gray calcareous siltstone and shale; Minisink Limestone--dark-gray clayey limestone; New Scotland Formation--dark-gray fossiliferous shale and clayey limestone; Coeymans Formation--gray, clayey to sandy limestone.
State Pennsylvania
Name Ridgeley Formation through Coeymans Formation, undivided
Geologic age Devonian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)Minisink Limestone--dark-gray clayey limestone; New Scotland Formation--dark-gray clayey limestone; Coeymans Formation--gray, clayey to sandy limestone.
Sedimentary > Clastic > Siltstone (Bed, Calcareous)Shriver Chert--gray siltstone; Port Ewen Shale--darkgray calcareous siltstone
Sedimentary > Clastic > Mudstone > Shale (Bed)Shriver Chert--gray shale; Port Ewen Shale--darkgray shale; New Scotland Formation--dark-gray fossiliferous shale
Minor
Sedimentary > Clastic > Sandstone (Bed)Ridgeley Formation--white siliceous sandstone
Sedimentary > Chemical > Chert (Bed)Shriver Chert--dark-gray chert
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 - Monroe