Geologic units in McDonald county, Missouri

Osagean Series (Early Mississippian-Osagean Series) at surface, covers 84 % 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 9 % of this area

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

Devonian System (Late to Early Devonian) at surface, covers 3 % 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.

Meramecian Series (Late Mississippian-Meramecian Series) at surface, covers 2 % of this area

St. Louis Limestone, Salem Formation, Warsaw Formation.

Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite (Early Ordovician-Ibexian Series) at surface, covers 1 % of this area

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

Keokuk and Reeds Spring Formations and St. Joe Group (Early Mississippian) at surface, covers 0.1 % of this area

TULSA- "Keokuk Formation," chert and limestone. "Reeds Spring Formation," chert and limestone. "St. Joe Group," limestone and shale. FORT SMITH- Mkr "Keokuk Formation," chert; "Reeds Spring Formation," chert and limestone; and "St. Joe 'Group,'" limestone and marlstone.

Boone Formation (Early Mississippian- Meramecian to Osagean) at surface, covers < 0.1 % of this area

Boone Formation

Pitkin + Fayetteville + Batesville + Hindsville + Moorefield Formations (Late Mississippian) at surface, covers < 0.1 % of this area

TULSA- "Pitkin Formation," limestone. "Fayetteville Formation," shale and thin limestone. "Batesville Formation," fine-grained sandstone. "Hindsville Formation," limestone and shale. "Moorefield Formation," limestone, shale, and siltstone.