Whitehorse Formation (Canada)
| Whitehorse Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Spray River Group |
| Sub-units | Winnifred Member Brewster Limestone Olympus Sandstone Lentil Starlight Evaporite Member |
| Underlies | Fernie Formation |
| Overlies | Sulphur Mountain Formation |
| Thickness | Up to 500 metres (1,640 ft) |
| Lithology | |
| Primary | Limestone, dolomite |
| Other | Sandstone, gypsum |
| Location | |
| Coordinates | 52°59′5″N 117°20′48″W / 52.98472°N 117.34667°W |
| Region | Alberta, British Columbia |
| Country | Canada |
| Type section | |
| Named for | Whitehorse Creek |
| Named by | P.S. Warren |
| Year defined | 1945 |
The Whitehorse Formation is a geologic formation of Late Triassic age. It is present on the western edge of the Western Canada Sedimentary Basin in western Alberta and northeastern British Columbia. It was first described as a member of the Spray River Formation by P.S. Warren in 1945, who named it for Whitehorse Creek, a tributary of the McLeod River south of Cadomin, Alberta. It was later raised to formation status.
Marine fossils from the Late Triassic epoch including crinoids, brachiopods, bivalves, and gastropods, have been found in the Whitehorse Formation.