Irish Valley Member of Catskill Formation (PADciv;17)

State	Pennsylvania
Name	Irish Valley Member of Catskill Formation
Geologic age	Devonian
Original map label	Dciv
Primary rock type	siltstone
Secondary rock type	mudstone
Other rock types	sandstone; conglomerate
Lithologic constituents	Major Sedimentary > Clastic > Siltstone (Bed) Minor Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Mudstone (Bed) Incidental Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (Bed)Lower part of member has conglomeratic sandstones.
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	Blair - Columbia - Dauphin - Fulton - Huntingdon - Juniata - Lebanon - Luzerne - Montour - Northumberland - Perry - Schuylkill - Snyder - Union