imported>Volcanoguy: removed Category:Siltstone formations; added Category:Siltstone groups using HotCat

2025-06-04T20:35:17Z

removed Category:Siltstone formations; added Category:Siltstone groups using HotCat

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{{Short description|Stratigraphic Group in Western Canada}}
{{Infobox Rockunit
| name = Schooler Creek Group
| type = [[Geological group]]
| age = [[Ladinian]] to [[Norian]] {{Fossil range|235|203| }}
| period = Norian
| prilithology = [[Limestone]], [[Dolomite (rock)|dolomite]]
| otherlithology = [[Siltstone]], [[shale]], [[evaporite]] [[mineral]]s
| namedby = F.H. McLearn, 1921
| region = [[British Columbia]]
| country = [[Canada]]
| coordinates = {{coord|56.2769|N|120.9836|W|name=Pacific Fort St. John No. 16|display=inline,title}}
| subunits = Bocock Formation, Pardonet Formation, [[Baldonnel Formation]], Ludington Formation, Charlie Lake Formation, Halfway Formation
| underlies = [[Fernie Formation|Fernie]], [[Bullhead Group|Bullhead]], [[Fort St. John Group]]
| overlies = [[Toad Formation]], [[Doig Formation]]
| thickness = up to {{convert|730|ft|m|-1}}<ref name=lexicon>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:013387 |title=Schooler Creek Group|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-10}}</ref>
}}
The '''Schooler Creek Group''' is a [[stratigraphic unit]] of [[Middle Triassic|Middle]] to [[Late Triassic]] ([[Ladinian]] to [[Norian]]) [[Geochronology|age]] in the [[Western Canadian Sedimentary Basin]]. It is present in northeastern [[British Columbia]]. It was named for Schooler Creek, a left tributary of [[Williston Lake]], and was first described in two oil wells (Pacific Fort St. John No. 16 and Southern Production No. B-14-1) northwest of [[Fort St. John, British Columbia|Fort St. John]], by F.H. McLearn in 1921.<ref>McLearn, F.H., 1921. Mesozoic of upper Peace River, British Columbia [[Geological Survey of Canada]], Summary Report 1920, Part B, p. 1-6.</ref> Exposures along [[Williston Lake]] serve as a [[type locality (geology)|type locality]] in [[outcrop]].

==Lithology==
The Schooler Creek Group is composed of [[limestone]] and [[Dolomite (rock)|dolomite]], with subordinate [[siltstone]], [[shale]], [[sandstone]], and [[evaporite]] [[mineral]]s such as [[gypsum]] and [[anhydrite]].

==Distribution==
The Schooler Creek Group [[outcrop]]s in the foothills of the northern [[Canadian Rockies]] in northeastern British Columbia, where it reaches its maximum thickness of {{convert|730|ft|m|-1}}. In the subsurface, it extends throughout the plains of the [[Peace River Country]]. The [[Pardonet Formation]] has its type locality at Pardonet Hill, on the south shore of the [[Williston Lake]] at {{coord|56.05328|-123.01889|name=Pardonel Hill}}.

==Relationship to other units==
The Schooler Creek Group is [[unconformity|unconformably]] overlain by the [[Fernie Formation|Fernie]] shale, or by the [[Bullhead Group|Bullhead]] or [[Fort St. John Group]]. It conformably overlies the [[Toad Formation]] or the [[Doig Formation]].

===Subdivisions===

The Schooler Creek Group has the following sub-divisions from top to base:
{|class="wikitable"
|-
! [[Geological unit|Sub-unit]] !! [[Geochronology|Age]] !! Lithology !! Thickness !! Reference
|-
| Bocock Formation || late [[Norian]] || [[aphanitic]] [[crystalline]] and bioclastic [[limestone]] || {{convert|63|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:001584 |title=Bocock Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref>
|-
| Pardonet Formation || [[Norian]] || [[limestone]], silty [[limestone]], [[siltstone]], rare [[shale]] || {{convert|137|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:011512 |title=Pardonet Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref>
|-
| [[Baldonnel Formation]] || [[Carnian]] || [[limestone]], dolomite, with interbeds of [[siltstone]] and very fine grained [[sandstone]] || {{convert|146|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:000714 |title=Baldonnel Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref>
|-
| Ludington Formation || [[Carnian]] || [[Dolomite (mineral)|dolomitic]] and [[Calcite|calcareous]] [[siltstone]], [[sandstone]], bioclastic [[limestone]] || {{convert|500|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:008848 |title=Ludington Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref>
|-
| Charlie Lake Formation || [[Carnian]] || [[Aeolian processes|aeolian]] [[sandstones]], [[limestone]], dolomite and evaporite minerals such as [[anhydrite]]. Deposited in a series of sand [[dunes]] and [[sabkah]] environments similar to the modern Coastal [[Erg (landform)|Ergs]] of [[Namibia]]. || {{convert|550|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:002775 |title=Charlie Lake Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref><ref>Higgs, R. "Sedimentology and Petroleum Geology of the Artex Member (Charlie Lake Formation), Northeast British Columbia [Abstract]." Bulletin of Canadian Petroleum Geology 38.1 (1990): 166-166.</ref><ref>Arnold, K.J. Origin and distribution of aeolian sandstones in the Triassic Charlie Lake Formation, northeastern British Columbia. 1996.</ref><ref>{{cite journal|last=Fefchak|first=Chelsea|title=Sedimentology of the Charlie Lake Formation|journal=MSC. Thesis, University of Alberta|date=Oct 2, 2011|hdl=10402/era.27704}}</ref>
|-
| Halfway Formation || early [[Ladinian]] to [[Carnian]] || [[sandstone]], with interbeds of [[siltstone]], dolomite and [[limestone]] || {{convert|416|m|ft|-1}}
|<ref>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:006138 |title=Halfway Formation|author=[[Lexicon of Canadian Geologic Units]] |accessdate=2009-02-11}}</ref>
|-
|}

==References==
{{reflist}}

{{WCSB|Northwest_Plains=yes}}

[[Category:Geologic groups of British Columbia]]
[[Category:Western Canadian Sedimentary Basin]]
[[Category:Triassic British Columbia]]
[[Category:Limestone groups of Canada]]
[[Category:Dolomite groups]]
[[Category:Siltstone groups]]
[[Category:Shale groups of Canada]]

Schooler Creek Group - Revision history

imported>Volcanoguy: removed Category:Siltstone formations; added Category:Siltstone groups using HotCat