| Alexo Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Underlies | Palliser Formation |
| Overlies | Southesk Formation, Mount Hawk Formation |
| Thickness | Up to about 100 metres (330 ft)[1] |
| Lithology | |
| Primary | Dolomite |
| Other | Siltstone |
| Location | |
| Coordinates | 52°26′00″N 115°54′00″W / 52.43333°N 115.90000°W |
| Region |  Alberta |
| Country |  Canada |
| Type section | |
| Named for | Alexo, Alberta |
| Named by | R. de Wit and D.J. McLaren, 1950.[2] |
The Alexo Formation a stratigraphic unit of Late Devonian (late Frasnian to early Famennian) age. It is present on the western edge of the Western Canada Sedimentary Basin in the central Rocky Mountains and foothills of Alberta. The formation consists primarily of dolomite. It is locally fossiliferous and includes remains of marine animals such as brachiopods[2] and conodonts.[3][4]
- ^ Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. ISBN 0-920230-23-7.
- ^ a b de Wit, R. and McLaren, D.J. 1950. Devonian sections in the Rocky Mountains between Crows Nest Pass and Jasper, Alberta. Geological Survey of Canada, Paper 50-23, 66 p.
- ^ Clark, D.L. and Ethington, R.L. 1965. Conodont biostratigraphy of part of the Devonian of the Alberta Rocky Mountains. Bulletin of Canadian Petroleum Geology, vol. 13, no. 3, p. 382-388.
- ^ McLean, R.A. and Klapper, G. 1998. Biostratigraphy of Frasnian (Upper Devonian) strata in western Canada, based on conodonts and rugose corals. Bulletin of Canadian Petroleum Geology, vol. 46, no. 4, p. 515-563.