# Rundle Group > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Rundle_Group > Markdown URL: https://mediated.wiki/source/Rundle_Group.md > Source: https://en.wikipedia.org/wiki/Rundle_Group > Source revision: 1307031003 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Geological formation in Canada}} {{Use mdy dates|date=June 2025}} {{Infobox Rockunit | name = Rundle Group | image = MountRundle.jpg | caption = The massive limestone beds form outcrops at the top of [Mount Rundle](/source/Mount_Rundle). | type = [Geological formation](/source/Geological_formation) | age = {{Fossil range|Middle Mississippian|Late Mississippian|Middle to Late [Mississippian](/source/Mississippian_age)}} | period = Mississippian | prilithology = [Limestone](/source/Limestone) | otherlithology = [Chert](/source/Chert) | namedfor = [Mount Rundle](/source/Mount_Rundle) | namedby = R.J.W. Douglas, 1953 | region = Alberta, British Columbia | country = Canada | coordinates = {{coord|51.15|N|115.50|W|display=inline,title}} | unitof = | subunits = [Debolt](/source/Debolt_Formation), [Shunda](/source/Shunda_Formation), [Pekisko](/source/Pekisko_Formation), [Mount Head](/source/Mount_Head_Formation), [Livingstone](/source/Livingstone_Formation), [Turner Valley](/source/Turner_Valley_Formation), [Prophet](/source/Prophet_Formation) | underlies = [Fernie Formation](/source/Fernie_Formation), [Belloy Formation](/source/Belloy_Formation) | overlies = [Banff Formation](/source/Banff_Formation) | thickness = up to {{cvt|741|m|ft|-1}}{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:013065 |title=Rundle Group |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 |archive-date=February 22, 2013 |archive-url=https://archive.today/20130222015657/http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:013065 |url-status=dead }} | extent = | area = | map = | map_caption = }} The '''Rundle Group''' is a [stratigraphic unit](/source/stratigraphic_unit) of [Mississippian](/source/Mississippian_age) [age](/source/Geochronology) in the [Western Canadian Sedimentary Basin](/source/Western_Canadian_Sedimentary_Basin). It takes the name from [Mount Rundle](/source/Mount_Rundle) (itself taking the name from [Robert Terrill Rundle](/source/Robert_Terrill_Rundle)), and was first described in outcrops at the northern side of the mountain in [Banff National Park](/source/Banff_National_Park) by R.J.W. Douglas in 1953.Douglas, R.J.W., 1953b. Carboniferous stratigraphy in the southern Foothills of Alberta; Alberta Soc. Petrol. Geol., 3rd Ann. Field Conf. Guidebook, p. 66–88. ==Lithology== The Rundle Group consists of massive [limestone](/source/limestone) interbedded with dark argillaceous limestone. [Chert](/source/Chert) nodules are observed in the shaley beds, and [crinoid](/source/crinoid)s and [brachiopod](/source/brachiopod)s are observed in the clean massive beds. [Dolimitization](/source/Dolimitization) is observed in the [Elkton Member](/source/Elkton_Member) of the [Turner Valley Formation](/source/Turner_Valley_Formation). ==Distribution== The Rundle Group reaches a maximum thickness of {{convert|741|ft|m|-1}} at [Tunnel Mountain](/source/Tunnel_Mountain). It thins out toward east and north and is completely [eroded](/source/erosion) or absent in east [central](/source/central_Alberta) and only the lower part occurs in [southern Alberta](/source/southern_Alberta). ==Relationship to other units== The Rundle Group is [disconformably](/source/unconformity) overlain by the [Rocky Mountain Formation](/source/Rocky_Mountain_Formation) in the front ranges of the [Canadian Rockies](/source/Canadian_Rockies) and by the [Fernie Formation](/source/Fernie_Formation) in the foothills and by [Cretaceous](/source/Cretaceous) beds in the prairies. It conformably overlies the [Banff Formation](/source/Banff_Formation). The Rundle Group can be correlated with the [Mission Canyon Formation](/source/Mission_Canyon_Formation) in southern Saskatchewan, northeastern Montana and North Dakota. ===Subdivisions=== The Rundle Group includes the [Mount Head Formation](/source/Mount_Head_Formation) and [Livingstone Formation](/source/Livingstone_Formation) in the [Rocky Mountains](/source/Rocky_Mountains); by the [Turner Valley Formation](/source/Turner_Valley_Formation), [Shunda Formation](/source/Shunda_Formation) and [Pekisko Formation](/source/Pekisko_Formation) in the foothills and plains. It is equivalent to the [Debolt Formation](/source/Debolt_Formation) and [Prophet Formation](/source/Prophet_Formation) in north-eastern British Columbia and west-[northern Alberta](/source/northern_Alberta). [Debolt](/source/Debolt_Formation), [Shunda](/source/Shunda_Formation) and [Pekisko](/source/Pekisko_Formation) formations are staked in the [Fort Nelson](/source/Fort_Nelson%2C_British_Columbia) area. ====[Canadian Rockies](/source/Canadian_Rockies)==== {|class="wikitable" |- ! [Sub-unit](/source/Geological_unit) !! [Age](/source/Geochronology) !! Lithology !! Max.
Thickness !! Reference |- |[Mount Head Formation](/source/Mount_Head_Formation) || [Visean](/source/Visean) ||[Wileman Member](/source/Wileman_Member) - silty [dolomite](/source/Dolomite_(rock))
[Baril Member](/source/Baril_Member) - [ooid](/source/oolite) [grainstone](/source/grainstone), dolomite
[Salter Member](/source/Salter_Member) - [dolomite](/source/Dolomite_(rock)), [boundstone](/source/boundstone_(rock)) and [wackestone](/source/wackestone), ooid [grainstone](/source/grainstone), [anhydrite](/source/anhydrite) [chert](/source/chert)
[Loomis Member](/source/Loomis_Member) - massive [grainstone](/source/grainstone)
[Marston Member](/source/Marston_Member) - microcrystalline dolomite, [boundstone](/source/boundstone_(rock)), [breccia](/source/breccia), ooid limestone, [shale](/source/shale), [marlstone](/source/marlstone)
[Opal Member](/source/Opal_Member) - [grainstone](/source/grainstone), subordinate [marlstone](/source/marlstone), [chert](/source/chert) [packstone](/source/packstone) and [wackestone](/source/wackestone), [shale](/source/shale), [marlstone](/source/marlstone), [breccia](/source/breccia)
[Carnarvon Member](/source/Carnarvon_Member) - [wackestone](/source/wackestone) to [packstone](/source/packstone), [shale](/source/shale) interbeds|| {{cvt|7.6|m|ft|-1}}
{{cvt|39|m|ft|-1}}
{{cvt|67|m|ft|-1}}
{{cvt|101|m|ft|-1}}
{{cvt|68|m|ft|-1}}
{{cvt|161|m|ft|-1}}
{{cvt|90|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:010227 |title=Mount Head Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 }} |- |[Livingstone Formation](/source/Livingstone_Formation) || [Tournaisian](/source/Tournaisian) to [Visean](/source/Visean) || [crinoid](/source/crinoid)al [limestone](/source/limestone), massive limestone, thin argillaceous limestone beds, dolomite || {{cvt|452|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:008601 |title=Livingstone Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 |archive-date=July 7, 2012 |archive-url=https://archive.today/20120707092317/http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:008601 |url-status=dead }} |- |} ====Foothills and plains==== {|class="wikitable" |- ! [Sub-unit](/source/Geological_unit) !! [Age](/source/Geochronology) !! Lithology !! Max.
Thickness !! Reference |- | [Turner Valley Formation](/source/Turner_Valley_Formation) || [Visean](/source/Visean) || [crinoid](/source/crinoid)al [limestone](/source/limestone) and crystalline dolomite; two porous intervals are separated by a middle tight unit; [diagenetically](/source/diagenesis) dolomitized in west [southern Alberta](/source/southern_Alberta); Lower porous zone is defined as [Elkton Member](/source/Elkton_Member) || {{cvt|110|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:015517 |title=Turner Valley Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 }} |- | [Shunda Formation](/source/Shunda_Formation) || [Tournaisian](/source/Tournaisian) to [Visean](/source/Visean) || [argillaceous](/source/shale) [limestone](/source/limestone) and dolomite, [siltstone](/source/siltstone), [sandstone](/source/sandstone), [shale](/source/shale), [breccia](/source/breccia), [anhydrite](/source/anhydrite) || {{cvt|122 |m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:013726 |title=Shunda Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 }} |- | [Pekisko Formation](/source/Pekisko_Formation) || [Tournaisian](/source/Tournaisian) || Upper Pekisko - lithographic limestone
Lower Pekisko - massive [crinoid](/source/crinoid)al [limestone](/source/limestone) || {{cvt|134|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:011645 |title=Pekisko Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 }} |- |} ====Deep basin==== {|class="wikitable" |- ! [Sub-unit](/source/Geological_unit) !! [Age](/source/Geochronology) !! Lithology !! Max.
Thickness !! Reference |- | [Debolt Formation](/source/Debolt_Formation) || [Meramecian](/source/Meramecian) || Upper Debolt - crystalline dolomite, [anhydrite](/source/anhydrite), [micritic](/source/micrite) [limestone](/source/limestone)
Lower Debolt - [cherty](/source/chert) bioclastic ([crinoid](/source/crinoid)al) [limestone](/source/limestone), [argillaceous](/source/shale) in the north || {{cvt|366|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:003842 |title=Debolt Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 |archive-date=July 11, 2012 |archive-url=https://archive.today/20120711082741/http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:003842 |url-status=dead }} |- | [Prophet Formation](/source/Prophet_Formation) || middle [Tournaisian](/source/Tournaisian) to late [Visean](/source/Visean) || [chert](/source/chert), skeletal to [ooid](/source/oolite) [limestone](/source/limestone), [shale](/source/shale), [marlstone](/source/marlstone), dolomite || {{cvt|760|m|ft|-1}} |{{Cite web |url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:012238 |title=Prophet Formation |author=[Lexicon of Canadian Geologic Units](/source/Lexicon_of_Canadian_Geologic_Units) |access-date=February 12, 2009 }} |- |} ==References== {{reflist}} {{WCSB|Northwest_Plains=yes|South AB=yes|Canadian Rockies=yes}} Category:Geologic groups of Alberta Category:Geologic groups of British Columbia Category:Carboniferous Alberta Category:Carboniferous British Columbia Category:Limestone groups of Canada Category:Chert groups --- Adapted from the Wikipedia article [Rundle Group](https://en.wikipedia.org/wiki/Rundle_Group) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Rundle_Group?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.