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
TypeFormation
UnderliesEminence Dolomite and Oneota Dolomite
OverliesDavis Formation,[1] Derby-Doerun Dolomite,[2] and Franconia Formation
Location
Coordinates38°05′30″N 90°41′07″W / 38.091733°N 90.685176°W / 38.091733; -90.685176
RegionIllinois, Indiana, Missouri
CountryUnited States

Paleofauna

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See also

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References

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  1. General Stratigraphic Column for Paleozoic Rocks in Indiana
  2. Thompson, Thomas L., 2001, Lexicon of Stratigraphic Nomenclature in Missouri, Missouri Department of Natural Resources, Division of Geology and Land Survey, Report of Investigation Number 73, p 229
  3. Stinchcomb, Bruce; Angeli, Nicholas (2002). "New Cambrian and Lower Ordovician monoplacophorans form the Ozark Uplift, Missouri". Journal of Paleontology. 76 (6): 965–974. Bibcode:2002JPal...76..965S. doi:10.1017/S0022336000057802.