Tetcho Formation

Tetcho Formation
Stratigraphic range: Famennian
Type Geological formation
Underlies Kotcho Formation
Overlies Trout River Formation
Fort Simpson Formation
Thickness up to 75 metres (250 ft)[1]
Lithology
Primary Limestone
Other Shale
Location
Named for Tetcho Lake
Named by H.R. Belyea, D.J. McLaren, 1962
Region  British Columbia
 Northwest Territories
Country  Canada

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

It takes the name from Tetcho Lake, and was first described in the Imperial Island River No. 1 well (located south of Trout Lake by H.R. Belyea and D.J. McLaren in 1962.[2]

Contents

Lithology

The Tetcho Formation is composed of fine grained limestone with shale partings, silty at the base. [1]

Distribution

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.

Relationship to other units

The Tetcho Formation is conformably overlain by the Kotcho Formation and conformably overlays the Trout River Formation and Fort Simpson Formation.[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.

References

  1. ^ a b c d Lexicon of Canadian Geologic Units. "Tetcho Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:015078. Retrieved 2009-03-01. 
  2. ^ Belyea, H.R. and McLaren, D.J., 1962. Upper Devonian formations, southern part of Northwest Territories, northeastern British Columbia and northwestern Alberta; Geological Survey of Canada, Paper 61-29, 74 p.