Pleasanton Group(Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Missourian])at surface, covers 14 % of this area
Includes: Shale Hill FM (base SH), and Hepler FM. Chiefly gray to very dark gray or yellowish gray shale with sandstone members and some limestone and coal.
Marmaton Group(Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Desmoinesian])at surface, covers 52 % of this area
Includes: Lost Branch FM, Memorial Shale, Lenapah Limestone (base LE), Nowata Shale, Altamont Limestone (base PA), Bandera Shale, Pawnee Limestone (base PA), Labette Shale and Fort Scott Limestone.
Cherokee Group(Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Desmoinesian])at surface, covers 9 % of this area
Includes: Cabaniss FM (base CA) with Verdigris Limestone Member (base V) and Mineral coal bed (base MC), Krebs FM with Bluejacket Sandstone Member (base BJ) and Warner Sandstone Member (base WR).