The Saskatchewan Group is a stratigraphical unit of Frasnian age in the Western Canadian Sedimentary Basin.
| Saskatchewan Group | |
|---|---|
| Stratigraphic range: | |
| Type | Geological group |
| Sub-units | Birdbear Formation Duperow Formation |
| Underlies | Three Forks Group |
| Overlies | Manitoba Group |
| Thickness | up to 350 metres (1,150 ft)[1] |
| Lithology | |
| Primary | Carbonate |
| Other | Evaporite |
| Location | |
| Coordinates | 50°21′18″N 106°54′07″W / 50.355°N 106.902°W |
| Region | WCSB Williston Basin |
| Country |  Canada United States |
| Type section | |
| Named for | Saskatchewan |
| Named by | A.D Baillie, 1953 |
It takes the name from the province of Saskatchewan, and was first described in the Mobil Oil Woodley Sinclair Cantuar X-2-21 well by A.D Baillie in 1953.[2]
Lithology
editThe Saskatchewan Group is composed of carbonates with thin evaporites. [1]
Distribution
editThe Saskatchewan Group reaches a maximum thickness of 350 metres (1,150 ft).[1] It is present in the sub-surface throughout the Williston Basin.
Subdivisions
editThe Saskatchewan Group contains the following formations, from top to base:
| Sub-unit | Age | Lithology | Max. Thickness |
Reference |
|---|---|---|---|---|
| Birdbear Formation | Frasnian | Upper: dolomite with evaporite interbeds Lower: non-argillaceous limestone and dolomite |
45 m (150 ft) | [3] |
| Duperow Formation | Frasnian | limestone and dolomite, anhydrite, halite; up to 27 depositional cycles | 300 m (980 ft) | [4] |
Relationship to other units
editThe Saskatchewan Group is conformably overlain by the Three Forks Group and conformably overlays the Manitoba Group carbonates.[1]
It is equivalent to the upper Beaverhill Lake Formation, the Woodbend Group and the lower part of the Winterburn Group in central Alberta, and with the Jefferson Group in Montana and North Dakota.
References
edit- ^ a b c d Lexicon of Canadian Geologic Units. "Saskatchewan Group". Retrieved 2010-01-01.
- ^ Baillie, A.D., 1953. "Devonian names and correlations of the Williston Basin area; American Association of Petroleum Geologists Bulletin, vol. 37, no. 2 (February), pp. 444-447.
- ^ Lexicon of Canadian Geologic Units. "Birdbear Formation". Retrieved 2010-01-09.
- ^ Lexicon of Canadian Geologic Units. "Duperow Formation". Retrieved 2010-01-09.