Kakisa Formation
| Kakisa Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Underlies | Trout River Formation |
| Overlies | Redknife Formation, Fort Simpson Formation |
| Thickness | up to 57 metres (190 ft)[1] |
| Lithology | |
| Primary | Limestone |
| Location | |
| Coordinates | 60°47′06″N 121°04′37″W / 60.785°N 121.077°W |
| Region |  British Columbia Northwest Territories |
| Country |  Canada |
| Type section | |
| Named for | Kakisa River |
| Named by | H.R. Belyea, D.J. McLaren, 1962 |
The Kakisa Formation is a stratigraphical unit of Frasnian age in the Western Canadian Sedimentary Basin.
It takes the name from the Kakisa River, a tributary of the Mackenzie River, and was first described in outcrop on the banks of the Trout River by H.R. Belyea and D.J. McLaren in 1962.[2]
Lithology
[edit]The Kakisa Formation is composed of silty and dolomitic limestone. [1] Reef builders such as corals and stromatoporoids can be identified in the formation. It is reefoid in its northern extent, where its thickness is variable.
Distribution
[edit]The Kakisa Formation reaches a maximum thickness of 57 metres (190 ft).[1] it occurs at the surface in outcrops along the Kakisa River between Tathlina Lake and Kakisa Lake and as an escarpment along the Mackenzie River. In the sub-surface, it can be found in north-eastern British Columbia, where it is typically 30 metres (100 ft) thick, and thins out towards the Peace River Arch.
Relationship to other units
[edit]The Kakisa Formation is disconformably overlain by the Trout River Formation and conformably overlays the Redknife Formation (east) or the Fort Simpson Formation (west).[1]
It is equivalent to parts of the Winterburn Group in central Alberta. Towards the west, it becomes shaley and turns into the Fort Simpson Formation.
References
[edit]- ^ a b c d Lexicon of Canadian Geologic Units. "Kakisa Formation". Retrieved 2009-03-01.
- ^ Belyea, H.R. and McLaren, D.J., 1962. Upper Devonian formations, southern pan of Northwest Territories, northeastern British Columbia and northwestern Alberta. Geological Survey of Canada, Paper 61-29.