The Labiche Formation is a stratigraphical unit of late Albian to Santonian age in the Western Canadian Sedimentary Basin.
| Labiche Formation | |
|---|---|
| Stratigraphic range: | |
| 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″N 112°43′34″W / 55.01023°N 112.72600°W |
| Region | WCSB |
| Country |  Canada |
| Type section | |
| Named for | La Biche River |
| Named by | R.G. McConnell, 1892 |
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.