Tunnel Mountain Formation
The Tunnel Mountain Formation is a geologic formation that is present on the western edge of the Western Canada Sedimentary Basin in the Canadian Rockies of western Alberta. Named after Tunnel Mountain near Banff, it was deposited during the Early Pennsylvanian sub-period of the Carboniferous period.
| Tunnel Mountain Formation | |
|---|---|
| Stratigraphic range: | |
Tunnel Mountain in Banff, the namesake of the formation | |
| Type | Formation |
| Unit of | Spray Lakes Group |
| Sub-units | Tobermory Storelk Tyrwhitt |
| Underlies | Kananaskis Formation, Ishbel Group |
| Overlies | Etherington Formation |
| Thickness | up to about 200 metres (600 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | dolomite, quartzite |
| Location | |
| Region | Alberta |
| Country | Canada |
| Type section | |
| Named for | Tunnel Mountain |
| Named by | F.W. Beales, 1950 |
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