Kotcho Formation
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| Kotcho Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Underlies | Exshaw Formation |
| Overlies | Tetcho Formation |
| Thickness | up to 210.9 metres (690 ft)[1] |
| Lithology | |
| Primary | Shale |
| Other | Limestone |
| 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 | Kotcho Lake |
| Named by | H.R. Belyea, D.J. McLaren, 1962 |
The Kotcho Formation is a stratigraphic unit of middle Famennian age in the Western Canadian Sedimentary Basin.
It takes the name from Kotcho Lake and was first described in the Imperial Island River No. 1 by H.R. Belyea and D.J. McLaren in 1962.[2]
The Kotcho Formation is composed of green-grey shale, locally bituminous, with thin argillaceous limestone beds or lenses.[1]