Nature
The Redknife Formation is a Devonian rock unit in northern Canada’s Western Canadian Sedimentary Basin, first described in 1962 from exposures at Table Rock Rapids on the Trout River in the Northwest Territories. It extends from outcrops in the southern Northwest Territories into the subsurface of northeastern British Columbia and northwestern Alberta. The formation preserves marine deposition in two parts: the lower Jean Marie Member, a fossil-bearing dolomitic limestone of Frasnian age, and an upper unit dominated by calcareous shale. Corals and brachiopods help identify its Devonian marine setting, and the Jean Marie Member also serves as a source of natural gas in British Columbia.
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Northwest Territories · Canada