Cobourg Limestone

Cobourg Formation
Stratigraphic range: Ordovician
Type	Formation
Location
Region	Ontario
Country	Canada

The Cobourg Formation is a geologic formation in Ontario. It preserves fossils dating back to the Ordovician period. Technically the formation extends into New York State with Canadian section called Lindsay Formation. The formation was named by Raymond (1921). The Cobourg formation was estimated to have a total thickness of about 70 m.^[1]

Fossil found in the Cobourg Formation

• An example of a trilobite that lived during the Upper Ordovician, Flexicalymene croneisi. Found in 1941, in the Cobourg formation.^[2]

See also

• Colborne quarry: a limestone near Lake Ontario and is located in the Cobourg Formation.
• List of fossiliferous stratigraphic units in Ontario

References

1. Lee, P. J.; Winder, C. G. (1967-06-01). "FABRIC OF A MIDDLE ORDOVICIAN LIMESTONE AT COLBORNE, ONTARIO". Canadian Journal of Earth Sciences. 4 (3): 529–540. doi:10.1139/e67-028. ISSN 0008-4077.
2. "Ordovician Trilobites of Canada (alphabetized)". American museum of natural history.

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 8 July 2014.
• Various information of the Cobourg Formation and Colborne quarry. "FABRIC OF A MIDDLE ORDOVICIAN LIMESTONE AT COLBORNE, ONTARIO" Retrieved 9 February 2024.
• "Ordovician Trilobites of Canada (alphabetized)" Retrieved 9 February 2024.