Glenwood Formation Explained

Glenwood Formation
Type:	Formation
Age:	Ordovician
Period:	Ordovician
Extent:	Illinois and Minnesota

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

See also

• List of fossiliferous stratigraphic units in Illinois

References

• Web site: Fossilworks: Gateway to the Paleobiology Database. ((Various Contributors to the Paleobiology Database)). 17 December 2021. 25 March 2022. https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home. dead.