Tetcho Formation
| Tetcho Formation | |
|---|---|
| Stratigraphic range: | |
| 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 | |
| Coordinates | 60°09′18″N 121°18′16″W / 60.15500°N 121.30444°W |
| Region |  British Columbia Northwest Territories |
| Country |  Canada |
| Type section | |
| Named for | Tetcho Lake |
| Named by | H.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
[edit]The Tetcho Formation is composed of fine grained limestone with shale partings, silty at the base. [1]
Distribution
[edit]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
[edit]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
[edit]- ^ a b c d Lexicon of Canadian Geologic Units. "Tetcho Formation". Retrieved 2009-03-01.
- ^ 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.