Table 2. Generalized stratigraphic nomenclature for the Devonian Shale- Middle and Upper Paleozoic TPS in the northern part of Appalachian basin (See table 4 for list of references). N. Virginia and Western Western Sys- Ohio Northwestern International West Virginia Maryland tem Pennsylvania New York Stage Bluefield Maxton Formation Little Lime Mauch Chunk Fm. Mauch Chunk Fm. Pencil Cave ? Wymps Gap Mbr. Wymps Gap Mbr. Maxville Limestone Savage Dam Mauch Chunk ? Greenbrier Member Fm. Serpukhovian Upper Mississippisn Limestone Deer Valley Ls. Member Deer Valley Ls. Member Greenbrier Fm. ? Loyalhanna Member Loyalhanna Formation Maxville (Keener Limestone Big Injun) Visean ? Maccrady Fm. Logan Sandstone Keener Black Hand Member Big Injun Purslane Burgoon Sandstone Cuyahoga (Big Injun) Purslane Sandstone Sandstone Formation Squaw Tournaisian Weir Rockwell Shenango Rockwell Sunbury Shale Sunbury Formation Formation Formation L. Mississippian Berea Sandstone Berea Cuyahoga Murrysville Berea Rockwell Formation Riddlesburg Sh. Mbr. ss. Bedford Shale Price Formation Bedford/Cussewago Cleveland Member Riceville, Venango Oswayo Fm. Cattaraugus Fm. Oswayo Fm. Group Chagrin Hampshire Hampshire Panama Cgl. Shale Chadakoin Fm. Chadokin Fm. Famennian Formation Formation NE & Westfield Shs. Ohio Shale Huron Member Group Bradford Perrysburg Fm. Dunkirk Sh. Mbr. Java Fm. Java Fm. Olentangy Shale Foreknobs Fm. Foreknobs Formation Elk Group West Falls Fm. ? Lock Haven Fm. Gap Gp. Gap Gp. Catskill Formation Greenland Greenland Scherr Formation Frasnian Upper Devonian Scherr Formation Rhinestreet Mbr. Rhinestreet Sh. Member Brallier Formation Brallier Formation Brallier Fm. Sonyea Fm. Sonyea Fm. Harrell Shale Harrell Shale Harrell Shale Genesee Fm. Olentangy Shale Tully Limestone Tully Limestone Tully Limestone ? Moscow Shale Mahantango Mahantango Ludlowville Givetian Prout Limestone Formation Formation Shale Formation Plum Brook Shale Mahantango Skaneateles Shale Millboro Shale Middle Devonian Hamilton Group Marcellus Hamilton Group Delaware Marcellus Marcellus Marcellus Shale Marcellus Shale Tioga Limestone Shale Shale Shale Eifelian bentonite Selinsgrove Columbus Limestone Hunters- Need- Onondaga Limestone ville more Needmore Shale Limestone Bois Blanc Limestone Bois Blanc Fm. Chert Shale Needmore Shale Emsian Oriskany Ss. Oriskany Sandstone Oriskany Sandstone Ridgeley Mbr Shriver Chert Shriver Mbr. Licking Creek Ls. Mandata Shale Mandata Sh Mbr. Corriganville Ls. Pragian Corriganville Limestone Lower Ls. of Helderberg Age Healing Springs Ss. Helderberg Member New Creek Limestone New Creek Limestone Old Port Lower Devonian Lochkovian Keyser Limestone (Part) Keyser Limestone (part) Formation Silur Keyser Limestone (part) Keyser Limestone (part) ian Shale, siltstone, Black "gas" Sandstone, Section missing Red beds Limestone and sandstone shale Chert .