Geologic units in Pettis county, Missouri

Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite (Early Ordovician-Ibexian Series) at surface, covers 29 % of this area

Fine crystalline, silty, cherty dolomite, and oolitic chert with local sandstone beds.

Riverton Formation, Burgner Formation (Middle Pennsylvanian-Atokan Stage) at surface, covers 22 % of this area

Shale, clay, coal. Burgner Formation - limestone.

Osagean Series (Early Mississippian-Osagean Series) at surface, covers 21 % of this area

Keokuk Limestone, Burlington Limestone, Elsey Formation, Reeds Spring Formation, Pierson Limestone, Fern Glen Formation.

Kinderhookian Series (Early Mississippian-Kinderhookian Series) at surface, covers 20 % of this area

Northview Shale, Sedalia Formation, Compton Limestone, Bachelor Formation Chouteau Group, Hannibal Shale, Horton Creek Limestone.

Channel Sandstones (Pennsylvanian) at surface, covers 3 % of this area

Channel Sandstones

Devonian System (Late to Early Devonian) at surface, covers 2 % of this area

Chattanooga Shale, Sylamore Sandstone, Fortune Formation, Holts Summit Sandstone, Snyder Creek Shale, Cedar Valley Limestone, Louisiana Limestone, Saverton Shale, Grassy Creek Shale, Turpin Sandstone, Bushberg Sandstone, Glen Park Limestone, St. Larent Limestone, Beauvais Sandstone, Grand Tower Limestone, Clear Creek Chert, Little Saline Limestone, Grassy Knob Chert, Bailey Formation.

Cherokee Group - Cabaniss Subgroup, Krebs Subgroup (Middle Pennsylvanian-Middle Series-Desmonian Stage) at surface, covers 2 % of this area

Cabaniss Subgroup - cyclic deposits, shale, sandstone, clay and several workable coal beds. Krebs Subgroup - cyclic deposits, sandstone, siltstone, shale, clay and some workable coal beds.

Marmaton Group (Middle Pennsylvanian-Middle Series-Desmonian Stage) at surface, covers 0.2 % of this area

Cyclic deposits, shale and limestone with sandstone, clay and several coal beds, some workable.

Roubidoux Formation (Early Ordovician-Ibexian Series) at surface, covers < 0.1 % of this area

Sandstone, chert and interbedded dolomite