Potosi Dolomite

The Potosi Formation is a geologic formation in Missouri, Illinois and Indiana. It preserves fossils dating back to the Cambrian period.

Potosi Formation
Stratigraphic range: Cambrian
Fossil from the Potosi Dolomite
Type	Formation
Underlies	Eminence Dolomite and Oneota Dolomite
Overlies	Davis Formation,[1] Derby-Doerun Dolomite,[2] and Franconia Formation
Location
Coordinates	38.091733°N 90.685176°W / 38.091733; -90.685176
Region	Illinois, Indiana, Missouri
Country	United States

Paleofauna

Monoplacophora

• Gayneoconus

G. echolsi^[3]

See also

• List of fossiliferous stratigraphic units in Missouri
• Paleontology in Missouri