Geologic units in Pulaski county, Missouri

Roubidoux Formation (Early Ordovician-Ibexian Series) at surface, covers 44 % of this area

Sandstone, chert and interbedded dolomite

Smithville Dolomite, Powell Dolomite, Cotter Dolomite, Jefferson City Dolomite (Early Ordovician-Ibexian Series) at surface, covers 30 % of this area

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

Gasconade Dolomite (Early Ordovician-Ibexian Series) at surface, covers 25 % of this area

Coarse - crystalline cherty dolomite with a basal Gunter Sandstone Member.

Pennsylvanian Undifferentiated (Pennsylvanian) at surface, covers 2 % of this area

Pennsylvanian Undifferentiated

Chesterian Series (Late Mississippian-Chesterian Series) at surface, covers < 0.1 % of this area

Fayetteville Formation, Batesville Formation, Hindville Limestone, Vienna Limestone, Tar Springs Sandstone, Glen Dean Formation, Hardinsburg Formation, Golconda Formation, Cypress Formation, Paint Creek Formation, Yankeetown Sandstone, Renault Formation, Aux Vases Sandstone, Ste. Genevieve Limestone.

Osagean Series (Early Mississippian-Osagean Series) at surface, covers < 0.1 % of this area

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