Heidlersburg Member of Gettysburg Formation (PATRgh;1)

State	Pennsylvania
Name	Heidlersburg Member of Gettysburg Formation
Geologic age	Triassic
Original map label	Trgh
Primary rock type	shale
Secondary rock type	argillite
Other rock types	arkose; conglomerate; limestone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed)Red, green, and gray shale and argillite Minor Metamorphic > Metasedimentary > Metaclastic > Argillite (Bed)Red, green, and gray shale and argillite Sedimentary > Clastic > Conglomerate (Bed)some quartz conglomerate and limestone conglomerate. Sedimentary > Clastic > Sandstone > Arkose (Bed)minor thin beds of gray arkosic sandstone Incidental Sedimentary > Carbonate > Limestone (Bed)some quartz conglomerate and limestone conglomerate.
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	Adams - York