Pecatonica Formation

Pecatonica Formation
Pecatonica Formation
Stratigraphic range: Ordovician
Type	Formation
Unit of	Black River Group
Underlies	Plattin Formation
Overlies	Joachim Dolomite
Lithology
Primary	Limestone
Location
Region	Illinois, Indiana, Iowa and Wisconsin
Country	United States

Last updated June 30, 2025

The Pecatonica Formation is a geologic formation in Illinois. It preserves fossils dating back to the Ordovician period.

References

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.

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Pecatonica Formation

See also

References