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Stockton Formation

Stockton Formation - Light-gray to buff, coarse-grained, arkosic sandstone; includes reddish-brown to grayish-purple sandstone, siltstone, and mudstone.
State Pennsylvania
Name Stockton Formation
Geologic age Triassic
Primary rock type arkose
Secondary rock type siltstone
Other rock types sandstone; mudstone
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Arkose
Minor
Sedimentary > Clastic > Sandstoneincludes reddish-brown to grayish-purple sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone
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
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
Counties Berks - Bucks - Chester - Lancaster - Montgomery