Stonehenge Formation

Gray, finely crystalline limestone containing dark-gray silty laminations; numerous edgewise conglomerate beds.
State Pennsylvania
Name Stonehenge Formation
Geologic age Ordovician
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)gray, finely crystalline limestone
Incidental
Sedimentary > Clastic > Siltstone (Bed)containing dark-gray silty laminations
Sedimentary > Clastic > Conglomerate (Bed)numerous edgewise conglomerate beds
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 Berks - Dauphin - Lancaster - Lebanon