Clinton Group

Predominantly Rose Hill Formation--light-olive-gray to brownish-gray, fossiliferous shale; locally, limestone occurs near top; includes dark-reddish-gray, very fine to coarse-grained, ferruginous sandstone; east of Harrisburg, equivalent to Lizard Creek Member of Shawangunk Formation. Above Rose Hill is Keefer Formation--light- to dark-gray, fossiliferous sandstone, hematitic, oolitic sandstone, and shale; not recognized east of Harrisburg.
State Pennsylvania
Name Clinton Group
Geologic age Silurian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstoneincludes dark-reddish-gray, very fine to coarse-grained, ferruginous sandstone; Above Rose Hill is Keefer Formation--light- to dark-gray, fossiliferous sandstone, and hematitic, oolitic sandstone.
Sedimentary > Clastic > Mudstone > Shale (Bed)light-olive-gray to brownish-gray, fossiliferous shale; Above Rose Hill is Keefer Formation--light- to dark-gray shale
Minor
Sedimentary > Carbonate > Limestone
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 Bedford - Blair - Centre - Clinton - Columbia - Cumberland - Dauphin - Franklin - Fulton - Huntingdon - Juniata - Lebanon - Lycoming - Mifflin - Montour - Northumberland - Perry - Snyder - Union