Crowfoot Formation

Crowfoot Formation
Stratigraphic range: Frasnian
Type Geological formation
Underlies Stettler Formation
Overlies Southesk Formation
Thickness up to 38 metres (120 ft)[1]
Lithology
Primary Anhydrite, dolomite
Other Shale
Location
Coordinates 50°44′53″N 112°35′13″W / 50.748°N 112.587°WCoordinates: 50°44′53″N 112°35′13″W / 50.748°N 112.587°W
Region WCSB
Country  Canada
Type section
Named for Crowfoot Creek
Named by H.R. Belyea and D.J. McLaren, 1957

The Crowfoot Formation is a stratigraphical unit of Frasnian age in the Western Canadian Sedimentary Basin.

It takes the name from Crowfoot Creek, a tributary of the Bow River and was first described in the Royalite Crowfoot No. 2 well, located near the creek by H.R. Belyea and D.J. McLaren in 1957. [2]

Lithology

The Crowfoot Formation consists of anhydrite, silty dolomite, with minor shale. [1]

Distribution

The Crowfoot Formation is typically 4 metres (10 ft) thick, but can reach up to 38 metres (120 ft).[1]

Relationship to other units

The Crowfoot Formation is overlain by the Stettler Formation and overlays the Southesk Formation.[1]

It is equivalent to the Calmar Formation and part of the Graminia Formation in central Alberta and to the Torquay Formation in Saskatchewan, Manitoba and Montana.

References

  1. ↑ 1.0 1.1 1.2 1.3 Lexicon of Canadian Geologic Units. "Crowfoot Formation". Retrieved 2010-01-01.
  2. ↑ Belyea, H.R. and McLaren, D.J., 1957. Upper Devonian nomenclature in southern Alberta. Journal of the Alberta Society of Petroleum Geologists, v. S. p.166-182.