Kaskapau Formation

Kaskapau Formation Stratigraphic range: Turonian to Coniacian PreЄ Є O S D C P T J K Pg N
Kaskapau Shale
Type	Geological formation
Unit of	Smoky River Group
Sub-units	Doe Creek Member, Pouce Coupe Member, Wartenbe Member, Tuskoola Member
Underlies	Bad Heart Formation, Cardium Formation
Overlies	Dunvegan Formation
Thickness	up to 900 meters (3,000 ft)
Lithology
Primary	Carbonaceous shale
Other	Sandstone tongues and lenticles, volcanic ash
Location
Coordinates	55°55′N 118°38′W / 55.917°N 118.633°W / 55.917; -118.633 (Kaskapau Formation)Coordinates: 55°55′N 118°38′W / 55.917°N 118.633°W / 55.917; -118.633 (Kaskapau Formation)
Region	Western Canadian Sedimentary Basin
Country	Canada
Type section
Named by	McLearn, 1926

The Kaskapau Formation is a geological formation in North America whose strata date back to the Late Cretaceous.

The name derives from kaskapahtew (ᑲᐢᑲᐸᐦᑌᐤ), the Cree word for "smoky".^[1] It was first described on the banks of the Smoky River, close to the confluence with the Puskwaskau River by F.H. McLearn in 1926.^[2]

Geographical distribution

Kaskapau shale exposed along the Pouce Coupe River

The formation is 170 meters (560 ft) thick in the Peace River and Smoky River area, and thickens up to 900 meters (3,000 ft)^[3] in the foothills of the Northern Rocky Mountains in British Columbia. It is exposed along the Peace River near Dunvegan, as well as in the Smoky River area.

The formation is part of the Smoky River Group, and is conformably overlain by the Bad Heart Formation in the western area, and unconformably by the Cardium Formation in the Pouce Coupe River area. It is conformable underlain by the Dunvegan Formation.^[3]

The Kaskapau Formation is equivalent to the Colorado Group shale in central Alberta. It is equivalent to the upper Blackstone Formation, the Cardium Formation, and the Muskiki Formation in the Canadian Rockies foothills in western Alberta.

Lithology

The Kaskapau Formation is represented mostly by dark grey shale, with sandstone tongues and lentils at the base (Doe Creek Member, Pouce Coupe Member). Thin volcanic ash layers may occur in the British Columbia foothills.

Paleontology

Oyster fossils are encountered at the base of the formation, and Inoceramus fragments (such as I. labiatus) are found throughout the entire stack. Ammonites are also present in the sand beds, genus encountered include Dunveganoceras and Watinoceras in the lower part and Scaphites in the upper part. Microfauna include benthonic (and fewer planktonic) foraminifera.

References

↑ Cree Dictionary. "Kaskapahtew". Retrieved 2010-03-17.
↑ McLearn, F.H., 1926. "New species from the Coloradoan of lower Smoky and lower Peace rivers, Alberta"; Geological Survey of Canada, Summary Report 1926, Part B, pp. 117-127.
1 2 Lexicon of Canadian Geological Units. "Kaskapau Formation". Retrieved 2009-02-06.

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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