Dunvegan Formation
| Dunvegan Formation | |
|---|---|
Ma | |
Shaftesbury Formation) | |
| Thickness | up to 380 feet (120 m)[1] |
| Lithology | |
| Primary | Sandstone |
| Other | Shale |
| Location | |
| Coordinates | 55°55′14″N 118°37′55″W / 55.92043°N 118.63203°W |
| Region | Northeast  British ColumbiaNorthwest  Alberta |
| Country |  Canada |
| Type section | |
| Named for | Dunvegan, Alberta |
| Named by | George Mercer Dawson |
| Year defined | 1881 |
  Dunvegan Formation (Canada) | |
The Dunvegan Formation is a stratigraphical unit of Cenomanian age in the Western Canadian Sedimentary Basin.
It takes the name from the settlement of
Peace River near Dunvegan by George Mercer Dawson in 1881.[2]
Fossils
and dinosaur body fossils are also known from the formation, including:- Specimen HH 2017.010.002, an ankylosaur femur discovered along the Murray River in 1993 and was described in 2024.[5]
- Specimen CMN 59667, a block containing two vertebrae and two ribs from an ankylosaur that was discovered along the Pine River in 1930 and was described in 2020.[6]
- Other ankylosaur remains including
Bony fish,[7][8] sharks,[9] crocodylian footprints,[3] and Metasequoia leaves[6] have also been found in the Dunvegan Formation.
Lithology
The Dunvegan Formation is composed of
Grande Prairie, where the formation is porous
.
Hydrocarbon production
The Dunvegan Formation had an initial established recoverable
reserve of 9.9 million m³, with 3.1 million m³ already produced as of 2008.[10] Gas reserves totaled 18.7 million m³, with 4.5 million m³ already produced.[11]
Distribution
The Dunvegan Formation is 180 feet (50 m) thick in its type locality in
Blackstone Formation
.
The Dunvegan Formation is exposed in outcrop along and near the
Chinchaga area, as well as patches in north-western Alberta and south of the Caribou Mountains
.
Relationship to other units
The Dunvegan Formation is conformably overlain by marine shales of the
diachronous and the boundaries of the Dunvegan are placed at the first and last appearances of sandstone within the shale-dominated succession.[12]
References
- ^ Lexicon of Canadian Geologic Units. "Dunvegan Formation". Archived from the original on 2013-02-21. Retrieved 2009-02-10.
- ^ Dawson, G.M., 1881. Report on the exploration from Port Simpson on the Pacific Coast to Edmonton on the Saskatchewan River, Embracing a portion of the northern part of British Columbia and the Peace River Country, with Maps 150 and 152; Geological Survey of Canada, Report of Progress 1879-1880, Part B, p. 1-77.
- ^ ISSN 0891-2963.
- ISSN 0008-4077.
- ^ S2CID 267961368.
- ^ ISSN 2193-0074.
- ISSN 0008-4077.
- ISSN 0008-4077.
- ISSN 0008-4077.
- ^ Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of oil reserves and production data". Archived from the original on 2009-03-28. Retrieved 2009-03-06.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ^ Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of gas reserves and production data". Retrieved 2009-03-06.
{{cite web}}: CS1 maint: multiple names: authors list (link) - doi:10.2113/48.1.43.