Gull River Formation

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Gull River Formation
Stratigraphic range: Caradoc
~460.9–449 Ma
Gull River formation1.jpg
Gull River Formation exposed along the shore of Lake St. John, Ramara
TypeFormation
Unit ofSimcoe Group
Black River Group
UnderliesBobcaygeon Formation
OverliesShadow Lake Formation
Lithology
PrimaryLimestone, dolomite
OtherShale, sandstone
Location
RegionOntario, New York
CountryCanada, United States
Type section
Named forGull River
Named byV. J. Okulitch
Year defined1939

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 dolomites 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 978-0--7778--9451--4.

See also[]


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