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Pakowki Formation

Pakowki Formation
Stratigraphic range: Campanian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Underlies	Foremost Formation, Judith River Formation
Overlies	Milk River Formation
Thickness	up to 200 metres (660 ft)^[1]
Lithology
Primary	Shale
Other	Siltstone, sandstone
Location
Coordinates	49°11′33″N 111°04′00″W / 49.19251°N 111.06669°W / 49.19251; -111.06669 (Pakowki Formation)
Region	WCSB
Country	Canada
Type section
Named for	Pakowki Lake
Named by	D.B. Dowling, 1916

The Pakowki Formation is a stratigraphic unit of Campanian age in the Western Canadian Sedimentary Basin.

It takes the name from Pakowki Lake, and was first described in outcrop along the Pakowki Coulee by D.B. Dowling in 1916.^[2]

Lithology

The Formation is composed of grey mudstone. ^[1] Olive siltstone and very fine grained sandstone can occur locally. A thin pebble conglomerate marks the base.

Distribution

The Pakowki Formation reaches a maximum thickness of 200 metres (660 ft) in central Saskatchewan.^[1] It reaches into southern Alberta, thinning out as it progresses westwards towards the Canadian Rockies foothills.

Relationship to other units

The Pakowki Formation is abruptly overlain by the Milk River Formation and gradationally overlays the Judith River Formation or Foremost Formation.^[1]

It is equivalent to the upper part of the Lea Park Formation in central Alberta. It is not differentiated from the Riding Mountain Formation to the east into eastern Saskatchewan and Manitoba.

References

1 2 3 4 Lexicon of Canadian Geologic Units. "Pakowki Formation". Retrieved 2010-01-01.
↑ Dowling, D.B., 1916. Water Supply, Southeastern Alberta (Contains Geological Map 1604); Geological Survey of Canada, Summary Report 1915, pp. 102-110.

v t e Western Canada 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
Southern Alberta plains	Cypress Hills FM Porcupine Hills FM Ravenscrag FM Edmonton GRP Belly River GRP Oldman FM Foremost FM Pakowki FM Milk River FM Colorado GRP Mannville GRP Ellis GRP Swift FM Rierdon FM Sawtooth FM Rundle GRP Banff FM Exshaw FM Bakken FM Wabamun FM Crowfoot FM Nisku FM Ireton FM Leduc FM Cooking Lake FM Beaverhill Lake GRP Elk Point GRP Canadian Shield
Saskatchewan	Cypress Hills FM Ravenscrag FM Frenchman FM Whitemud FM Eastend FM Bearpaw FM Judith River GRP Belly River FM Oldman FM Foremost FM Lea Park FM Pakowki FM Milk River FM Colorado GRP Viking FM Mannville GRP Pense FM Cantuar FM Success FM Vanguard FM Ellis GRP Swift FM Rierdon FM Sawtooth FM Shaunavon FM Piper FM Gravelbourg FM Gypsum Springs FM Watrous FM Big Snowy GRP Madison GRP Charles FM Poplar Ratcliffe Midale Mission Canyon FM Kisbey SS Alida Tilston Lodgepole FM Souris Valley Three Forks GRP Bakken FM Big Valley FM Torquay FM Saskatchewan GRP Birdbear FM Duperow FM Manitoba GRP Souris River FM Elk Point GRP Davson Bay FM Prairie FM Winnipegosis FM Ashern FM Interlake FM Stonewall FM Stony Mountain FM Herald FM Yeoman FM Winnipeg FM Deadwood FM Canadian Shield

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