Crowfoot Formation
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°44′53″N 112°35′13″W / 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 |
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
- ^ a b c d Lexicon of Canadian Geologic Units. "Crowfoot Formation". Archived from the original on 2013-02-21. Retrieved 2010-01-01.
- ^ 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.
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