Crowfoot Formation

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

Crowfoot Formation Stratigraphic range: Frasnian PreꞒ Ꞓ O S D C P T J K Pg N
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	50.748°N 112.587°W / 50.748; -112.587 (Crowfoot Formation)
Region	Alberta Western Canadian Sedimentary Basin
Country	Canada
Type section
Named for	Crowfoot Creek
Named by	H.R. Belyea and D.J. McLaren, 1957

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. Lexicon of Canadian Geologic Units. "Crowfoot Formation". Archived from the original on 2013-02-21. 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.