Английская Википедия:Crowfoot Formation
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. [1]
Lithology
The Crowfoot Formation consists of anhydrite, silty dolomite, with minor shale. [2]
Distribution
The Crowfoot Formation is typically Шаблон:Convert thick, but can reach up to Шаблон:Convert.[2]
Relationship to other units
The Crowfoot Formation is overlain by the Stettler Formation and overlays the Southesk Formation.[2]
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
Шаблон:Western Canadian Sedimentary Basin
- ↑ 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.
- ↑ 2,0 2,1 2,2 Шаблон:Cite web
