Lansing Group
(Late Pennsylvanian-Upper Series-Missourian Stage) at surface, covers 43 % of this area Cyclic deposits of limestone and shale.
Kansas City Group
(Late Pennsylvanian-Upper Series-Missourian Stage) at surface, covers 36 % of this area Cyclic deposits, limestone and shale with minor sandstone and coal.
Douglas Group
(Late Pennsylvanian-Upper Series-Virgilian Stage) at surface, covers 18 % of this area Cyclic deposits, dominantly shale with sandstone, and limestone.
Shawnee Group
(Late Pennsylvanian-Upper Series-Virgilian Stage) at surface, covers 3 % of this area Cyclic deposits, limestone and shale with sandstone and siltstone.
