Keg River Formation
|Keg River Formation|
Stratigraphic range: Givetian
|Thickness||up to 300 metres (980 ft)|
|Named for||Keg River|
|Named by||J. Law, 1955|
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.
The Keg River Formation is composed of dark dolomite with intercrystalline or vuggy porosity and wackestone limestone.  The Rainbow Member and upper Keg River Member are reef formations deposited in the Rainbow, Zama and Bitscho sub-basins.
The Keg River Formation occurs in the subsurface from northeastern to northwestern Alberta and its southern border is defined by the Peace River Arch. It varies in depth from 10 metres (30 ft) to 300 metres (980 ft).
Relationship to other units
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.