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Elkton Member

Rundle Group
Stratigraphic range: Middle to Late Mississippian
MountRundle.jpg
The massive limestone beds form outcrops at the top of Mount Rundle
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°W / 51.13020; -115.47765 (Rundle Group)Coordinates: 51°07′49″N 115°28′40″W / 51.13020°N 115.47765°W / 51.13020; -115.47765 (Rundle Group)
Region  Alberta,  British Columbia
Country  Canada
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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