Proterozoic Paleozoic Perm. Age
Figure 3. Cambrian Ordovician Silurian Devonian Miss. Penn. stratigraphic packagesthataredefined infigure5andinterpretedontheseismicsections. Middle Middle Middle Upper Lower Upper Upper Upper Lower Lower Lower Middle Upper Upper Lower Lower Lower --Correlation chartofPaleozoicand Proterozoic rocksinthestudyareaandassociatedthrustsheets.Alsoshown aretimesofmajorextensionalandorogenicevents.Colorsreferto seismic West Chagrin West Falls Formation Shale Approximate location of BurleyNo.1well Knox unconformity Lockport DolomiteandKeeferSandstone Salina Group(includessaltbeds) the OhioShale Huron Mbr. of and WillsCreekFormation Venango Group(Formation) Tully Limestone,HamiltonGroup,MarcellusShale,andOnondagaLimestone and RicevilleFormation Upper sandstonememberoftheCopperRidgeDolomiteKnoxGroup Sonyea Formation Java Formation Rhinestreet ShaleMember Angola ShaleMember Genesee Formation BereaSandstone,SunburyShale,andPriceFormation ? Greenbrier LimestoneandMauchChunkGroup Oriskany SandstoneandHelderbergGroup Copper RidgeDolomiteoftheKnoxGroup Conasauga GroupandRomeFormation Reedsville Shale(Uticaatbase) Post-Pottsville rocks,undivided Bradford Group Formation orGroupName Tuscarora Sandstone Black RiverLimestone Grenvillian basement Beekmantown Group Rose HillFormation Trenton Limestone Juniata Formation Pottsville Group Elk Group McKenzie LimestoneandKeeferSandstone Salina Group,Tonoloway Limestone, and WillsCreekFormation Hampshire Formation Oswego Sandstone Greenland GapGroup Brallier Formation Harrell Shale East Lithology Seismic Stratigraphic Greenbrier Limestone Beekmantown Group post-Pottsville rocks Pottsville Groupand Trenton Limestone Juniata Formation Reedsville Shale Knox Groupand Venango Group Bradford Group Hamilton Group pre-Knox rocks Salina Group Grenvillian basement Packages Elk Group Alleghanian orogeny Passive continental Taconic orogeny Acadian orogeny Orogenic Events Extensional and margin modified by Rometrough extension Autochthonous Waynesboro Martinsburg Salina sheet Reedsville- Grenvillian basement Sheets Thrust Rome- sheet sheet