Английская Википедия:Crowfoot Formation

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Шаблон:Infobox rockunit

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:Reflist

Шаблон:Western Canadian Sedimentary Basin

  1. 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. 2,0 2,1 2,2 Шаблон:Cite web