8/29/2017 REGIONAL SUBSURFACE ROCK CORRELATION DIAGRAM APPALACHIAN STORAGE HUB PROJECT MAP INFORMAL SYSTEM SERIES SUBSURFACE STRATIGRAPHY INTERVAL NAMES Permian Lower ? Pennsylvanian Greenbrier Limestone GRNB Mined-rock cavern Keener, Big Lime, Big Injun, Mountain, Squaw, Weir, Coffee Shale, Keener sandstone Murrysville,Second Gas Mississippian to Berea Sandstone KENR-BERE Gas reservoir Venango Upper Devonian Gas reservoirs sandstones V5-V1 Gantz, Fifty-Foot, Hundred Foot; Thirty-Foot, Upper Nineveh, Snee, Lower Nineveh; Gordon Stray, Boulder, Gordon, Third; Fourth, Washington; Fifth, McDonald, Fifth A; Bayard, Bayard Stray, Elizabeth, Elizabeth Stray Bradford B5-B1 Upper First Warren; Second Warren; Third Warren; Upper Speechley, Speechley Stray, Brallier Speechley;Tiona, First Balltown; Elk E4-E1 Second Balltown; Sheffield, Third Balltown; Formation Bradford, Kane Riley, Elk, Benson, Alexander, Haverty, Middlesex Shale Fox, Sycamore Harrell Formation Devonian Mahantango Formation Middle Marcellus Shale Onondaga Limestone Huntersville Chert Oriskany Sandstone ORSK Gas reservoir Lower Upper Salina Group SLNF Salt cavern Newburg sandstone NBRG Localized gas reservoir Silurian Middle Lower Clinton/Medina Group Tuscarora Sandstone CATG Gas reservoir Upper Utica Sh Coburn Fm Salona Fm Ordovician Middle Lower Rose Run sandstone Gatesburg Formation Upper Sandy Member Upper RSRN Gas reservoir Middle ? ? ? Cambrian Lower Precambrian Diagram not to scale LEGEND Sandstone Evaporite/salt Murrysville Drillers’ Sand Names Siltstone and shale Chert Gas reservoir Type of potential storage Organic-rich shale Dolostone Coal Unconformity Limestone Crystalline basement rock.