Swan Hills Formation
| Beaverhill Lake Group Stratigraphic range: Middle to Late Devonian ~390–365 Ma |
|
|---|---|
| Type | Geological formation |
| Sub-units |
Swan Hills Formation Waterways Formation Slave Point Formation Fort Vermilion Formation |
| Underlies | Woodbend Group and Muskwa Formation |
| Overlies | Elk Point Group |
| Thickness | up to 220 metres (720 ft) |
| Lithology | |
| Primary | Calcareous shale, limestone |
| Other | Dolostone, anhydrite |
| Location | |
| Coordinates | 53°18′05″N 112°23′27″W / 53.30142°N 112.3908°WCoordinates: 53°18′05″N 112°23′27″W / 53.30142°N 112.3908°W |
| Region |
 Northwest Territories British Columbia Alberta
|
| Country |
 Canada
|
| Type section | |
| Named for | Beaverhill Lake |
| Named by | Imperial Oil staff, 1950 |
The Beaverhill Lake Group is a geologic unit of Middle Devonian to Late Devonian (late Givetian to Frasnian) age in the Western Canada Sedimentary Basin that is present in the southwestern Northwest Territories, northeastern British Columbia and Alberta. It was named by the geological staff of Imperial Oil in 1950 for Beaverhill Lake, Alberta, based on the core from a well that they had drilled southeast of the lake, near Ryley, Alberta (Anglo-Canadian Beaverhill Lake No. 2, 11-11-50-17W4).
Petroleum is produced from the Swan Hills Formation of the Beaverhill Lake Group in the Swan Hills area of northern Alberta.
The Beaverhill Lake Group consists of anhydrite and carbonate rocks at the base (the Fort Vermillion Formation), overlain by interbedded sequences of calcareous shale, argillaceous micritic limestone, limestone and dolostone. The group becomes thicker and more shaly to the west.
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