The Guelph Formation is a geologic formation in New York and in Ontario, Canada. It preserves fossils dating back to the Silurian period.[2]

Guelph Formation
Stratigraphic range: Silurian
Stromatolite from the Guelph Formation
TypeSedimentary
UnderliesVernon, Lockport Group
OverliesEramosa Member
Thickness160 feet[1]
Lithology
PrimaryDolomite
Location
Region New York
Country United States
Type section
Named forGuelph, Ontario
Named byWilliam Edmond Logan[1]

Fossils

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Fossils within the formation include:[1]

References

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  1. ^ a b c Logan, W.E., Murray, A., Hunt, T.S., and Billings, E., 1863. Geology of Canada. Report of Progress from its Commencement to 1863; Geological Survey of Canada, 983 p. [accompanied by an Atlas of Maps and Sections.] doi:10.4095/123563
  2. ^ Guelph, USGS, National Geologic Map Database, Geolex — Unit Summary