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Venango Formation

Venango Formation - Light-gray siltstone interbedded with some flaggy, gray sandstone and some bluish-gray shale; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation; referred to as "Cattaraugus" by some workers; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
StatePennsylvania
NameVenango Formation
Geologic ageDevonian
Original map labelDv
Primary rock typesiltstone
Secondary rock typesandstone
Other rock typesshale; conglomerate
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerate (Bed)Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Mudstone > Shale (Bed)some bluish-gray shale; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
Sedimentary > Clastic > Sandstone (Bed)some flaggy, gray sandstone; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
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
Geographic coverageCrawford - Erie - Forest - McKean - Warren

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