ⓘ Kotcho Formation
The Kotcho Formation is a stratigraphical unit of middle Famennian age in the Western Canadian Sedimentary Basin.
It takes the name from Kotcho Lake, and was first described in the Imperial Island River No. 1 by H.R. Belyea and D.J. McLaren in 1962.
1. Distribution
The Kotcho Formation reaches a maximum thickness of 210.9 metres 690 ft.It is up to 30 metres 100 ft thick in the Fort Nelson area, and thins down southwards, disappearing completely on the northern flank of the Peace River Arch.
2. Relationship to other units
The Kotcho Formation is overlain by the Exshaw Formation and conformably overlays the Tetcho Formation.
To the east, it grades into the upper Wabamun Group carbonate, and to the south-west into the Palliser Formation. To the east it is replaced by the Besa River Formation shale.
Besa River Formation |
Buckinghorse Formation |
Buffalo River Member |
Chinkeh Formation |
Ducette Member |
Fantasque Formation |
Kakisa Formation |
Kindle Formation |
Kotaneelee Formation |
Scatter Formation |
Tetcho Formation |
Trout River Formation |
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