The Crowfoot Formation is a stratigraphical unit of Frasnian age in the Western Canadian Sedimentary Basin.
| Crowfoot Formation | |
|---|---|
| Stratigraphic range: | |
| 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 |
| 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
editThe Crowfoot Formation consists of anhydrite, silty dolomite, with minor shale. [1]
Distribution
editThe Crowfoot Formation is typically 4 metres (10 ft) thick, but can reach up to 38 metres (120 ft).[1]
Relationship to other units
editThe 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
edit- ^ 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.