Table 1a. Generalized stratigraphy of Appalachian basin Total Petroleum Systems (adapted from de Witt and Milici, 1991, fig. 2).
TOTAL STRATIGRAPHIC ASSESSMENT RESERVOIR SOURCE PETROLEUM UNIT UNIT TYPE ROCK ERA SYSTEM PERIOD
Dunkard Group ian Perm- Coal Monongahela Continuous Coal Group sandstone Black shale Conemaugh Coal Coal
ANIAN Continuous
V Group sandstone Black shale Carboniferous Coal-bed Gas LITHOLOGY OF Allegheny Coal Coal Continuous Group sandstone Black shale SOURCE ROCK
PENNSYL Pottsville Coal Coal OR RESERVOIR Continuous Group sandstone Black shale Mauch Chunk / Ravencliff sand Pennington Conventional Coal, black shale, Formations Maxon sand Greenbrier Loyalhanna sand and sandstone Conventional Limestone Big lime Pocono Big Injun, Squaw, Conventional Formation Weir sands C
I Black shale and coal MISSISSIPPIAN Berea / Murrysville Berea sand Sunbury
Continuous Murrysville sand Sandstones Shale
Catskill, Brallier Fms.,
Venango, Bradford, Sandstone Cleveland, Elk sands; Continuous Upper Devonian Ohio, Huron,
O black shales
black shale
Rhinestreet Shales
Limestone Continuous Harrell Formation Black shale Burket Member
Hamilton Group Black shale Continuous Marcellus Shale Z
Onondaga Group
DEVONIAN Huntersville Chert
Conventional Dolomite Huntersville Chert "Corniferous" lime
Oriskany Ss. Oriskany sands Conventional
Helderberg Group O
Bass Islands
Dolomite
Salina Group Regional seal
Lockport Dolomite "Corniferous" lime Clinton Group Keefer or Big Six Continuous SILURIAN sand Medina Tuscarora/Clinch Ss. Continuous Group Clinton/Medina sand
E Juniata/Bald Bald Eagle sand Eagle Fms. Reedsville Shale
Utica Shale Utica Shale Continuous Utica Shale Devonian Shale-Middle and Upper Paleozoic L A Trenton Trenton Limestone Trenton Limestone Conventional Limestone
ORDOVICIAN Black River Black River Ls., Conventional Sevier/ Limestone Wells Creek fm. Blockhouse Sh. Utica-Lower Paleozoic
P Beekmantown Group Upper Knox Dol. Conventional
Chepultepec and Rose Run sand, Conventional Copper Ridge Dols. Lower Knox, Dol. Conasauga Conasauga Formation / Group Formation Rome Formation Rome Formation Mt. Simon Basal Clastics Sandstone Conasauga-Rome/Conasauga CAMBRIAN