Gull River Formation

Gull River Formation
Stratigraphic range: Caradoc
Gull River Formation exposed along the shore of Lake St. John, Ramara.
Type Formation
Unit of Simcoe Group
Black River Group
Underlies Bobcaygeon Formation
Coboconk Formation
Overlies Shadow Lake Formation
Lithology
Primary Limestone, dolostone
Other Shale, sandstone
Location
Region Ontario, New York
Country Canada, United States
Type section
Named for Gull River
Named by V. J. Okulitch
Year defined 1939

The Gull River Formation is a geological formation of Middle Ordovician age (Caradoc Stage), which outcrops in Ontario, Canada.[1] Lithologically, the formation is dominated by light grey to brown limestones and greenish gray dolostones with thin shale and sandstone interlayers.[2][3]

References

  1. ↑ "Gull River formation". Natural Resources Canada. January 9, 2008. Retrieved January 4, 2015.
  2. ↑ Armstrong, Derek K.; Dodge, J. E. P. (2007). Paleozoic Geology of Southern Ontario (PDF). Ontario Geological Survey. p. 4. ISBN 978-1-4249-4526-9.
  3. ↑ Armstrong, D. K. (2000). Paleozoic Geology of the Northern Lake Simcoe Area, South-Central Ontario (PDF). Ontario Geological Survey. pp. 9–15. ISBN 0--7778--9451--3.

See also


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