Schooler Creek Group

Schooler Creek Group Stratigraphic range: Ladinian to Norian PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Sub-units	Bocock Formation, Pardonet Formation, Baldonnel Formation, Ludington Formation, Charlie Lake Formation, Halfway Formation
Underlies	Fernie, Bullhead, Fort St. John Group
Overlies	Toad Formation, Doig Formation
Thickness	up to 730 feet (220 m)[1]
Lithology
Primary	Limestone, dolostone
Other	Siltstone, shale, evaporite
Location
Named by	F.H. McLearn, 1921
Coordinates	56°16′37″N 120°59′01″W / 56.2769°N 120.9836°W / 56.2769; -120.9836 (Pacific Fort St. John No. 16)Coordinates: 56°16′37″N 120°59′01″W / 56.2769°N 120.9836°W / 56.2769; -120.9836 (Pacific Fort St. John No. 16)
Region	Alberta,  British Columbia
Country	Canada

The Schooler Creek Group is a stratigraphical unit of Ladinian to Norian age in the Western Canadian Sedimentary Basin.

It was named for Schooler Creek, a left tributary of the Williston Lake, and was first described north-west of Fort St. John in the Pacific Fort St. John No. 16 and Southern Production No. B-14-1 wells by F.H. McLearn in 1921.^[2]

Lithology

The Schooler Creek Group is composed of limestone and dolostone, with subordinate siltstone, shale and evaporite.

Distribution

The Schooler Creek Group occurs in outcrops in the Canadian Rockies foothills, and a surface type locality for part of the Group can be found along Williston Lake. In the sub-surface it extends east and north from the Liard River throughout the Peace River Country. It reaches a maximum thickness of 730 feet (220 m) in the foothills.

The Pardonet Formation only occurs in the Canadian Rockies, and has its type locality at Pardonel Hill, on the south shore of the Williston Lake at 56°03′12″N 123°01′08″W / 56.05328°N 123.01889°W / 56.05328; -123.01889 (Pardonel Hill).

Relationship to other units

The Schooler Creek Group is unconformably overlain by the Fernie shale or by the 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:

Sub-unit	Age	Lithology	Thickness	Reference
Bocock Formation	late Norian	aphanitic crystalline and bioclastic limestone	63 metres (210 ft)	[3]
Pardonet Formation	Norian	limestone, silty limestone, siltstone, rare shale	137 metres (450 ft)	[4]
Baldonnel Formation	Carnian	limestone, dolostone, with interbeds of siltstone and very fine grained sandstone	146 metres (480 ft)	[5]
Ludington Formation	Carnian	dolomitic and calcareous siltstone, sandstone, bioclastic limestone	500 metres (1,640 ft)	[6]
Charlie Lake Formation	Carnian	carbonate and evaporite	550 metres (1,800 ft)	[7]
Halfway Formation	early Ladinian to Carnian	sandstone, with interbeds of siltstone, dolostone and limestone	416 metres (1,360 ft)	[8]

References

1. ^ Lexicon of Canadian Geologic Units. "Schooler Creek Group". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:013387. Retrieved 2009-02-10. 
2. ^ McLearn, F.H., 1921. Mesozoic of upper Peace River, British Columbia Geological Survey of Canada, Summary Report 1920, Part B, p. 1-6.
3. ^ Lexicon of Canadian Geologic Units. "Bocock Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:001584. Retrieved 2009-02-11. 
4. ^ Lexicon of Canadian Geologic Units. "Pardonet Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:011512. Retrieved 2009-02-11. 
5. ^ Lexicon of Canadian Geologic Units. "Baldonnel Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:000714. Retrieved 2009-02-11. 
6. ^ Lexicon of Canadian Geologic Units. "Ludington Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:008848. Retrieved 2009-02-11. 
7. ^ Lexicon of Canadian Geologic Units. "Charlie Lake Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:002775. Retrieved 2009-02-11. 
8. ^ Lexicon of Canadian Geologic Units. "Halfway Formation". http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:006138. Retrieved 2009-02-11.