Alexo Formation
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TypeFormation
UnderliesPalliser Formation
OverliesSouthesk Formation, Mount Hawk Formation
ThicknessUp to about 100 metres (330 ft)[1]
| 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]
The Alexo Formation was deposited in a marine setting and consists of dolomite, silty and argillaceous dolomite, dolomitic siltstone, and vuggy dolomite. It has a maximum thickness of about 100 metres (330 ft), and is thinner in areas where it covers carbonate buildups (reefs) in the underlying formations.[1]
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