Huntley Mountain Formation

Greenish-gray and light-olive-gray, flaggy, fine-grained sandstone, siltstone, and a few red shale interbeds; includes lower "Pocono" plus "Oswayo" of earlier workers. Forms transition between Catskill Formation and Burgoon Sandstone.
State Pennsylvania
Name Huntley Mountain Formation
Geologic age Mississippian and Devonian
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)Greenish-gray and light-olive-gray, flaggy, fine-grained sandstone
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)a few red shale interbeds
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 Bradford - Cameron - Centre - Clearfield - Clinton - Columbia - Elk - Jefferson - Luzerne - Lycoming - McKean - Potter - Sullivan - Tioga - Wyoming