Stratigraphic range: Late Albian
Crossbedded Viking sandstone
|Underlies||Big River Formation|
|Overlies||Joli Fou Formation|
|Thickness||up to 50 metres (160 ft)|
|Named for||Viking, Alberta|
|Named by||Dowling et al., 1919|
The Viking Formation is composed of fine to coarse grained sandstone with interbeds of conglomerate and cherty conglomeratic sandstone.  Nodular phosphorite, coal fragments and concretionary siderite occur in the coarse beds.
The Viking Formation had an initial established recoverable oil reserve of 88.7 million m³, with 66.8 million m³ already produced as of 2008. Gas reserves totaled 277.9 million e³m³ (or 227,900 million m³), with 103.4 million e³m³ (or 103,400 million m³already produced.
Hydraulic fracturing in Canada
Massive hydraulic fracturing has been widely used in Alberta since the late 1970s.:1044 The method is currently used in development of the Cardium, Duvernay, Montney and Viking formations in Alberta, Bakken formation in Saskatchewan, Montney and Horn River formations in British Columbia.
The Viking Formation occurs in the sub-surface of central and eastern Alberta and in west-central Saskatchewan. It reaches a maximum thickness of 50 metres (160 ft) in central Alberta and thins out to 40 metres (130 ft) in Saskatchewan. Thinner sandstone beds can be recognized into western Alberta.
Relationship to other units
It is equivalent to the Bow Island Formation in southern Alberta, to the Newcastle Formation in North Dakota, to the Ashville Formation in Manitoba, the Pelican Sandstone in north-eastern Alberta and the Flotten Lake Sand in central Saskatchewan. It can be correlated with the Cadotte Member of the Peace River Formation in north-western Alberta.
- Lexicon of Canadian Geologic Units. "Viking Formation". Retrieved 2009-03-01.
- Dowling, D.B., Slipper, S E., and McLearn, F.H., 1919. Investigations in the gas and oil fields of Alberta, Saskatchewan and Manitoba. Geological Survey of Canada, Memoir 116.
- Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of oil reserves and production data". Retrieved 2009-03-06.
- Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of gas reserves and production data". Retrieved 2009-03-06.
- Cant, Douglas J.; Ethier, Valerie G. (August 1984), "Lithology-dependent diagenetic control of reservoir properties of conglomerates, Falher member, Elmworth Field, Alberta,", Bulletin of the American Association of Petroleum Geologists, 68 (8)