Brunswick Formation (PATRb;3)

State	Pennsylvania
Name	Brunswick Formation
Geologic age	Triassic
Original map label	Trb
Primary rock type	mudstone
Secondary rock type	siltstone
Other rock types	shale; argillite
Lithologic constituents	Major Sedimentary > Clastic > Mudstone (Bed)Reddish-brown mudstone, interbedded argillites near base. Minor Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Siltstone (Bed) Incidental Metamorphic > Metasedimentary > Metaclastic > Argillite (Bed)Reddish-brown mudstone, interbedded argillites near 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 - Chester - Lehigh - Montgomery