Warsaw Formation

The Warsaw Formation is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian subperiod.

Warsaw Formation
Stratigraphic range: Mississippian
Geode from the Warsaw Formation (Warsaw, Hancock County, Illinois)
Type	Formation
Underlies	Salem Formation
Overlies	Keokuk Limestone[1]
Location
Region	Illinois, Iowa, Missouri
Country	United States
Type section
Named for	Warsaw, Hancock County, Illinois[1]

See also

• Paleontology portal

• List of fossiliferous stratigraphic units in Illinois
• List of fossiliferous stratigraphic units in Iowa
• List of fossiliferous stratigraphic units in Missouri