Hardyston Formation

Typically light-gray, fine- to medium-grained quartzite, and feldspathic sandstone; color ranges from nearly white to dark gray; massive bedded; Scolithus present in upper part; quartz-pebble conglomerate occurs at base.
State Pennsylvania
Name Hardyston Formation
Geologic age Cambrian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)feldspathic sandstone; color ranges from nearly white to dark gray; massive bedded; Skolithos present in upper part
Metamorphic > Metasedimentary > Metaclastic > Quartzitetypically light-gray, fine- to medium-grained quartzite
Minor
Sedimentary > Clastic > Conglomerate (Bed)quartz-pebble conglomerate occurs at base
Comments On the paper map, in the map description for this unit, Scolithus is spelled Skolithus.
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 - Bucks - Lancaster - Lebanon - Lehigh - Northampton