Coalspur Formation
The Coalspur Formation is an Upper Cretaceous to lower Palaeocene stratigraphic unit of the Western Canada Sedimentary Basin in the foothills of southwestern Alberta. Its deposition spanned the time interval from latest Cretaceous (Maastrichtian) to early Palaeocene, and it includes sediments that were deposited before, during, and after the Cretaceous-Paleogene (K-Pg) extinction event. It includes the economically important coal deposits of the Coalspur Coal Zone, as well as nonmarine plant and animal fossils.
| Coalspur Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Unit of | Saunders Group |
| Sub-units | Coalspur coal zone, Entrance conglomerate |
| Underlies | Paskapoo Formation |
| Overlies | Brazeau Formation |
| Thickness | Up to about 550 metres (1,800 ft) |
| Lithology | |
| Primary | Sandstone, siltstone, shale |
| Other | Coal, conglomerate, bentonite |
| Location | |
| Coordinates | 53.0°N 116.8°W |
| Approximate paleocoordinates | 60.6°N 91.6°W |
| Region | Alberta |
| Country | Canada |
| Extent | Western Canada Sedimentary Basin |
| Type section | |
| Named for | Coalspur, Alberta |
| Named by | B.R. MacKay |
| Year defined | 1949 |
Coalspur Formation (Canada) Coalspur Formation (Alberta) | |
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