The Coalspur Formation is an Upper Cretaceous to lower Palaeocene stratigraphic unit of the Western Canada Sedimentary Basin in the foothills of southwestern Alberta.

The sediments of the Coalspur Formation were eroded from the Canadian Cordillera, and were transported eastward by river systems and deposited in fluvial channel and floodplain environments.

[2] The formation consists primarily of sandstones and siltstones, interbedded with mudstones and minor amounts of bentonite.

[4] The boundary subdivides the Coalspur Formation into an upper member called the Coalspur coal zone which is of early Paleocene age, and an unnamed lower member of latest Cretaceous age.

It is mined in the Alberta Coal Branch area and shipped to electric power generating stations in Canada and abroad.