Hardyston Formation (PACAha;23)

State	Pennsylvania
Name	Hardyston Formation
Geologic age	Cambrian
Original map label	Cha
Comments	On the paper map, in the map description for this unit, Scolithus is spelled Skolithus.
Primary rock type	quartzite
Secondary rock type	sandstone
Other rock types	conglomerate
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
Map references	Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip [http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx]
Unit 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, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip [http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx]
Geographic coverage	Berks - Bucks - Lancaster - Lebanon - Lehigh - Northampton