Elkton Member
| Rundle Group Stratigraphic range: Middle to Late Mississippian |
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|---|---|
The massive limestone beds form outcrops at the top of Mount Rundle
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| Type | Geological formation |
| Sub-units | Debolt, Shunda, Pekisko, Mount Head, Livingstone, Turner Valley, Prophet |
| Underlies | Fernie Formation, Belloy Formation |
| Overlies | Banff Formation |
| Thickness | up to 741 metres (2,430 ft) |
| Lithology | |
| Primary | Limestone |
| Other | Chert |
| Location | |
| Coordinates | 51°07′49″N 115°28′40″W / 51.13020°N 115.47765°WCoordinates: 51°07′49″N 115°28′40″W / 51.13020°N 115.47765°W |
| Region |
 Alberta,  British Columbia
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| Country |
 Canada
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| Type section | |
| Named for | Mount Rundle |
| Named by | R.J.W. Douglas, 1953 |
The Rundle Group is a stratigraphical unit of Mississippian age in the Western Canadian Sedimentary Basin.
It takes the name from Mount Rundle (itself taking the name from Robert Terrill Rundle), and was first described in outcrops at the northern side of the mountain in Banff National Park by R.J.W. Douglas in 1953.
The Rundle Group consists of massive limestone interbedded with dark argillaceous limestone. Chert nodules are observed in the shaley beds, and crinoids and brachiopods are observed in the clean massive beds.Dolimitization is observed in the Elkton Member of the Turner Valley Formation.
The Rundle Group reaches a maximum thickness of 741 feet (230 m) at Tunnel Mountain. It thins out toward east and north and is completely eroded or absent in east central and only the lower part occurs in southern Alberta.
The Rundle Group is disconformably overlain by the Rocky Mountain Formation in the front ranges of the Canadian Rockies and by the Fernie Formation in the foothills and by Cretaceous beds in the prairies. It conformably overlies the Banff Formation.
The Rundle Group can be correlated with the Mission Canyon Formation in southern Saskatchewan, northeastern Montana and North Dakota.
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