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

[2] The Tetcho Formation is composed of fine grained limestone with shale partings, silty at the base.

[1] The Tetcho Formation reaches a maximum thickness of 75 metres (250 ft).

[1] it occurs in the sub-surface in north-eastern British Columbia and southern Northwest Territories.

[1] It is equivalent to the lower Wabamun Group in Alberta and to parts of the Besa River Formation in the Liard area of British Columbia.