The Kotcho Formation is a stratigraphical unit of middle Famennian age in the Western Canadian Sedimentary Basin.

[2] The Kotcho Formation is composed of green-grey shale, locally bituminous, with thin argillaceous limestone beds or lenses.

[1] The Kotcho Formation reaches a maximum thickness of 210.9 metres (690 ft).

[1]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.

[1] To the east, it grades into the upper Wabamun Group carbonate, and to the south-west into the Palliser Formation.