Type Locality:

Pacific Fort St. John #23, in 3-29-83-18W6M, in northeastern British Columbia, between 2,020 and 2,680 m (6,630 and 8,796 ft).

Distribution:

The maximum known thickness is at the type area, where the Stoddart Group is 660 m (2165 ft) thick. The group is recognized in the foothills and Rocky Mountains in British Columbia, where the northwestern and southern limits are not well established, and through the Peace River subsurface into Alberta, between approximately Twps. 60 and 85, as far east as Rge. 23W5M.

Locality Data:

WELL 100032908318W600; PENN WEST ET AL FT ST JOHN 03-29-083-18. Thickness(m): Maximum 660, Typical 660. Interval(m): From 2020, To 2680.

Lithology:

The Stoddart Group is a succession of clastics and carbonates that is divided, in ascending order into the Golata, Kiskatinaw and Taylor Flat formations. The Golata Formation is a fossiliferous limestone at the base, which grades up to dark grey to black to greenish shales with occasional siltstone. Coal and anhydrite are developed locally in Alberta. The Kiskatinaw Formation is a quartzose sandstone with interbedded dark grey to variegated shale and rare carbonate beds. The Taylor Flat Formation is composed mainly of limestone and dolomite, with occasional sandstone beds. The lower part of the Taylor Flat is generally calcareous shale to argillaceous limestone.

Relationship:

The Stoddart Group rests conformably on the Debolt Formation, but is locally disconformable in Alberta it lies unconformably below Permian Belloy strata in the Peace River subsurface, and below the Kindle Formation or Mount Greene Beds of the Ishbel Group in the Rocky Mountains and foothills. According to most authors no major unconformities occur within the Stoddart. However local or regional conformities are present within the Kiskatinaw, and at the Kiskatinaw-Taylor Flat boundary in the Fort St. John and Peace River areas. The Stoddart passes westward into the Besa River formation and grades northward into the relatively, coarse-grained, partly continental Mattson Formation. It is equivalent to the upper Mount Head (Carnarvon Member), Etherington, Tunnel Mountain and Kananaskis formations of the Southern Rocky Mountains, and the Big Snowy Group in Montana.

Other Citations:

Bamber and Mamet, 1978; Halbertsma and Staplin, 1960; Macauley, 1958; McCrossan and Glaister, 1964; Rutgers, 1958; Hovdebo, 1962.

References:

Rutgers, A.T.C., 1958. Stoddart formation of northeast British Columbia; in: Jurassic and Carboniferous of western Canada, Goodman, A.J. (ed.), p. 327-330.