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Tetcho Formation

Coordinates: 60°09′18″N 121°18′16″W / 60.15500°N 121.30444°W / 60.15500; -121.30444 (Tetcho Formation)
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Tetcho Formation
Stratigraphic range: Famennian
TypeGeological formation
UnderliesKotcho Formation
OverliesTrout River Formation
Fort Simpson Formation
Thicknessup to 75 metres (250 ft)[1]
Lithology
PrimaryLimestone
OtherShale
Location
Coordinates60°09′18″N 121°18′16″W / 60.15500°N 121.30444°W / 60.15500; -121.30444 (Tetcho Formation)
Region British Columbia
 Northwest Territories
Country Canada
Type section
Named forTetcho Lake
Named byH.R. Belyea, D.J. McLaren, 1962

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]

Lithology

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

Distribution

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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

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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

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  1. ^ a b c d Lexicon of Canadian Geologic Units. "Tetcho Formation". 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.