| Sulphur Mountain Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Spray River Group |
| Sub-units | Phroso Member Mackenzie Dolomite Vega Member Whistler Member Llama Member[1] |
| Underlies | Whitehorse Formation |
| Overlies | Ishbel Group |
| Thickness | Up to 557 metres (1,830 ft)[2] |
| Lithology | |
| Primary | Siltstone, dolomite |
| Other | Mudstone, shale, sandstone |
| Location | |
| Coordinates | 51°5′24″N 115°31′35″W / 51.09000°N 115.52639°W |
| Region |  Alberta British Columbia |
| Country |  Canada |
| Type section | |
| Named for | Sulphur Mountain, Alberta |
| Named by | P.S. Warren[3] |
| Year defined | 1945 |
The Sulphur Mountain Formation is a geologic formation of Early to Middle Triassic age. It is present on the western edge of the Western Canada Sedimentary Basin in the foothills and Rocky Mountains of western Alberta and northeastern British Columbia. It includes marine fossils from the time shortly after the Permian-Triassic extinction event.[4][5]
The Sulphur Mountain Formation was first described as a member of the Spray River Formation by P.S. Warren in 1945,[3] who named it for Sulphur Mountain in Banff National Park. It was later raised to formation status.[1] Its type section is located in the Spray River gorge at the southern end of Sulphur Mountain.[1]
- ^ a b c Gibson, D.W. 1974. Triassic rocks of the southern Canadian Rocky Mountains. Geological Survey of Canada, Bulletin 230, 65 p.
- ^ Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. ISBN 0-920230-23-7.
- ^ a b Warren, P.S. 1945. Triassic faunas in the Canadian Rockies. American Journal of Science, vol. 243, no. 9, p. 480-491; doi: 2475/ajs.243.9.480.
- ^ Noad, Jon, 2017. "A previously unreported bone bed from the Triassic Sulphur Mountain Formation of Kananaskis and its implications for Montney sequence stratigraphy. Abstract, Canadian Society of Petroleum Geologists, GeoConvention 2017, 4 p" (PDF). Archived from the original (PDF) on 18 February 2018. Retrieved 15 February 2018.
{{cite web}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link) - ^ Noad, Jon, 2017. Field trip to examine Montney Formation analogs: Exposures of the Sulphur Mountain Formation around Canmore and Kananaskis, western Alberta, Canada. In: J.C.C. Hseih, ed., Geologic field trips of the Canadian Rockies: 2017 meeting of the GSA Rocky Mountain Section, Geological Society of America, Field Guide 48, p. 137-152; doi: 10.1130/2017.0048(05).