Keg River Formation
Keg River Formation Stratigraphic range: | |
---|---|
Type | Geological formation |
Underlies | Muskeg Formation |
Overlies | Chinchaga Formation |
Thickness | up to 300 metres (980 ft)[1] |
Lithology | |
Primary | Dolomite, limestone |
Location | |
Coordinates | 59°10′21″N 118°44′54″W / 59.1725°N 118.7482°WCoordinates: 59°10′21″N 118°44′54″W / 59.1725°N 118.7482°W |
Region | Alberta |
Country | Canada |
Type section | |
Named for | |
Named by | J. Law |
Year defined | 1955 |
The Keg River Formation is a stratigraphic unit of Givetian age in the Western Canada Sedimentary Basin.
Description[]
It takes the name from the Keg River, a tributary of the Peace River, and was first described in the California Standard Steen River 2-22-117-5W6M well (situated north of Zama Lake) by J. Law in 1955.
Lithology[]
The Keg River Formation is composed of dark dolomite with intercrystalline or vuggy porosity and wackestone limestone. [1] The Rainbow Member and upper Keg River Member are reef formations deposited in the Rainbow, Zama and Bitscho sub-basins.
Distribution[]
The Keg River Formation occurs in the subsurface from northeastern to northwestern Alberta and its southern border is defined by the . It varies in depth from 10 metres (30 ft) to 300 metres (980 ft).[1]
Relationship to other units[]
The Keg River Formation is conformably overlain by the Muskeg Formation and unconformably overlays the Chinchaga Formation.[1]
It is equivalent to the Pine Point Formation, Hume Formation and Nahanni Formation in north-eastern British Columbia and the Northwest Territories and to the Winnipegosis Formation in Saskatchewan and eastern Alberta.
Economic geology[]
Petroleum geology[]
Oil is produced from the Keg River reefs in the Zama Lake and Rainbow Lake areas of north-western Alberta.
References[]
- ^ a b c d Lexicon of Canadian Geologic Units. "Keg River Formation". Archived from the original on 2009-04-16. Retrieved 2009-03-01.
- Stratigraphy of Alberta
- Stratigraphy of British Columbia
- Stratigraphy of the Northwest Territories
- Devonian southern paleotropical deposits
- Givetian Stage