Warsaw Formation

Warsaw Formation
Stratigraphic range: Mississippian
Geode from the Warsaw Formation (Warsaw, Hancock County, Illinois)
TypeFormation
UnderliesSalem Formation
OverliesKeokuk Limestone
Location
RegionIllinois, Iowa, Missouri
CountryUnited States
Type section
Named forWarsaw, Hancock County, Illinois

The Warsaw Formation is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian subperiod. Brachiopod, bryozoan, and crinoid fossils are common, particularly the bryozoan Archimedes.

See also

References

  1. 1 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 145
  2. ↑ "Handbook of Illinois stratigraphy | Resources | UIUC". resources.isgs.illinois.edu. Retrieved 2026-03-12.