La Biche Group

Labiche Formation
Stratigraphic range: late Albian to Santonian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological group
Underlies	Belly River Formation
Overlies	Pelican Formation
Thickness	up to 420 metres (1,380 ft) [1]
Lithology
Primary	Shale
Location
Coordinates	55°00′37″N112°43′34″W / 55.01023°N 112.72600°W / 55.01023; -112.72600 (Labiche Formation)
Region	WCSB
Country	Canada
Type section
Named for	La Biche River
Named by	R.G. McConnell, 1892

The Labiche Formation is a stratigraphical unit of late Albian to Santonian age in the Western Canadian Sedimentary Basin.

It takes the name from La Biche River, a tributary of the Athabasca River, and was first described in outcrop in the Athabasca River valley by R.G. McConnell in 1892. ^[2]

Lithology

The Labiche Formation is composed shale with flakes of coccolithic debris, Inoceramus prisms, pyrite. ^[1]

Distribution

The Labiche Formation reaches a maximum thickness of 420 metres (1,380 ft) in the sub-surface of northern Alberta. ^[1]

Relationship to other units

The Labiche Formation is overlain by the Belly River Formation and conformably overlays the Pelican Formation. ^[1]

It is equivalent to the parts of the Colorado Group in central Alberta and to the sum of Smoky Group, Dunvegan Formation and Shaftesbury Formation in north-western Alberta.

References

1. Lexicon of Canadian Geologic Units. "Labiche Formation" . Retrieved 2010-01-09.
2. McConnell, R.G., 1893. Report on a portion of the district of Athabasca, comprising the country between Peace River and Athabasca River north of Lesser Slave Lake. Geological Survey of Canada, Annual Reptort (new series), 1890-91, v. 5, Part 1, p. 1-67.