Llewellyn Formation (PAPAl;7)

State	Pennsylvania
Name	Llewellyn Formation
Geologic age	Pennsylvanian
Original map label	Pl
Primary rock type	sandstone
Secondary rock type	siltstone
Other rock types	shale; conglomerate; coal
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed)Gray, fine- to coarse-grained sandstone Minor Sedimentary > Coal > Anthracite (Bed)numerous anthracite coals in repetitive sequences Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Siltstone (Bed) Incidental Sedimentary > Clastic > Conglomerate (Bed)
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	Carbon - Columbia - Dauphin - Lackawanna - Lebanon - Luzerne - Northumberland - Schuylkill - Susquehanna - Wayne