Gravelbourg Formation
| Gravelbourg Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Sub-units | Upper Gravelbourg Lower Gravelbourg |
| Underlies | Shaunavon Formation |
| Overlies | Watrous Formation Madison Group |
| Thickness | up to 60 metres (200 ft) |
| Lithology | |
| Primary | Shale, limestone |
| Other | Chert, anhydrite, sandstone |
| Location | |
| Coordinates | 49°27′50″N 108°35′34″W / 49.4638°N 108.5927°W |
| Region | WCSB |
| Country | Canada |
| Type section | |
| Named for | Gravelbourg, Saskatchewan |
| Named by | R.L. Milner and G.E. Thomas, 1954 |
The Gravelbourg Formation is a stratigraphic unit of Bajocian age in the Western Canadian Sedimentary Basin.
It takes the name from the town of Gravelbourg, and was first described in well Tidewater Eastend Crown No. 1 by R.L. Milner and G.E. Thomas in 1954.