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Beaverhill Lake 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°W / 53.30142; -112.3908 (Beaverhill Lake Group)Coordinates: 53°18′05″N 112°23′27″W / 53.30142°N 112.3908°W / 53.30142; -112.3908 (Beaverhill Lake Group)
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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