Baldonnel Formation

Baldonnel Formation Stratigraphic range: Carnian PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Unit of	Schooler Creek Group
Sub-units	Ducette Member
Underlies	Pardonet Formation, Fernie Formation
Overlies	Charlie Lake Formation
Thickness	up to 146 metres (480 ft)^[1]
Lithology
Primary	Limestone, dolostone
Other	Siltstone, sandstone
Location
Coordinates	56°06′51″N 122°48′39″W / 56.11404°N 122.81095°W / 56.11404; -122.81095 (Baldonnel Formation)Coordinates: 56°06′51″N 122°48′39″W / 56.11404°N 122.81095°W / 56.11404; -122.81095 (Baldonnel Formation)
Region	Alberta, British Columbia
Country	Canada
Type section
Named for	Baldonnel, British Columbia
Named by	L.M. Clark, 1957

It takes the name from the hamlet of Baldonnel, British Columbia, and was first described in the Pacific Fort St. John No. 16 well by L.M. Clark in 1957.^[2] A surface type locality can be found at Brown Hill, on the north shore of Williston Lake, at 56°06′51″N 122°48′39″W / 56.11404°N 122.81095°W / 56.11404; -122.81095 (Baldonnel Formation).

Lithology

The upper unit of the Baldonnel Formation consists of grey massive limestone and dolostone in the Canadian Rockies foothills and in the western range between the Liard River and Peace River. Siltstone and fine grained sandstone occur as interbeds.

In the sub-surface of the Peace River Country, the Baldonnel Formation is represented by porous and permeable dolostone.

Gas is produced from the Baldonnel Formation in north-eastern British Columbia.^[3]

The Baldonnel Formation occurs in outcrops in the Williston Lake area of the Canadian Rockies, and in the sub-surface from the Liard River to the Peace River Country.

It reaches a maximum thickness of 146 metres (480 ft) south of Hudson's Hope.

The Baldonnel Formation is the middle member of the Schooler Creek Group. It is conformably overlain by the Pardonet Formation limestone and siltstone or unconformably overlain by the Fernie Formation shale. North of the Williston Lake it overlies the dolomite beds of the Charlie Lake Formation.

It is equivalent to the upper parts of the McLearn Formation and Ludington Formation. It can also be correlated with the Winnifred Member of the Whitehorse Formation in central Alberta.

The lower unit is designated as Ducette Member.^[4] It occurs only in the south-west of the range, between the Liard River and the Peace River.

It is composed of argillaceous siltstone, very fine grained sandstone and limestone.

↑ Lexicon of Canadian Geologic Units. "Baldonnel Formation". Retrieved 2009-02-14.
↑ Clark, L.M., 1957. Fort St. John sets pace for Peace River gas fields. Oil and Gas Journal, v. SS, no. 33, p.132-134.
↑ "Hydrocarbon source rock characterization and thermal maturity of the Upper Triassic Baldonnel and Pardonet formations, northeastern British Columbia, Canada". Bulletin of Canadian Petroleum Geology. 52 (4): 277–301. December 2004. doi:10.2113/52.4.277. Retrieved 2009-02-14.
↑ Lexicon of Canadian Geologic Units. "Ducette Member". Retrieved 2009-02-14.

Western Canadian Sedimentary Basin

Hydrocarbon history	Oil sands and heavy oil Frontier exploration and development Natural gas liquids Natural gas

Depositional regions	Southern Alberta Central Alberta Northwestern Alberta Plains South-central Canadian Rockies foothills North-east Plains North-central foothills Liard River Fort Nelson Northern Rocky Mountains Fort St. John Saskatchewan Western Manitoba

Northwest plains	Paskapoo FM Scollard FM Wapiti GRP Smoky GRP Puskwaskau FM Badheart FM Muskiki FM Cardium FM Kaskapau FM Pouce Coupe MBR Doe Creek MBR Dunvegan FM Fort St. John GRP Shaftesbury FM Peace River FM Spirit River FM Bullhead GRP Bluesky FM Gething FM Cadomin FM Nikanassin FM Fernie GRP Rock Creek MBR Poker Chip Shale Nordegg MBR Schooler Creek GRP Baldonnel FM Charlie Lake FM Halfway FM Doig FM Montney FM Belloy FM Stoddart GRP Taylor Flat FM Kiskatinaw FM Golata FM Rundle GRP Debolt FM Shunda FM Pekisko FM Banff FM Exshaw FM Wabamun FM Trout River FM Kakisa FM Redknife FM Jean Marie MBR Woodbend GRP Irteton FM Fort Simpson FM Leduc FM Duvernay FM Cooking Lake FM Beaverhill Lake GRP Waterways FM Swan Hills FM Fort Vermilion FM Elk Point GRP Watt Mountain FM Gillwood MBR Presqu’ile FM Sulphur Point FM Pine Point FM Muskeg FM Zama MBR Black Shale Keg River FM Rainbow MBR Chinchaga FM Cold Lake FM Ernestina FM Basal Red Beds Granite Wash Canadian Shield

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