Belloy Formation
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| Belloy Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Underlies | Montney Formation, Fort St. John Group |
| Overlies | Rundle Group, Stoddart Group |
| Thickness | up to 274 metres (900 ft)[1] |
| Lithology | |
| Primary | Chert |
| Other | Sandstone, siltstone, conglomerate, dolomite |
| Location | |
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| Region | Alberta, British Columbia |
| Country | Canada |
| Type section | |
| Named for | Belloy, Alberta |
| Named by | H.L. Halbertsma, 1959 |
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The Belloy Formation is a stratigraphic unit of Permian age in the Western Canadian Sedimentary Basin.
It takes the name from the hamlet of Belloy, Alberta, and was first described in the Imperial Belloy 12-14-78-1W6M well by H.L. Halbertsma in 1959.[2]
Lithology and depositional setting
The Belloy Formation is composed of mixed carbonate-siliciclastic sequences of cherty dolomite and sandstone, glauconitic and quartz sandstones, phosphorite, siltstones and conglomerate with phosphatic chert pebbles. The Belloy was deposited along a northwest-trending, tidally-influenced, west-prograding shoreline.[3]
Distribution
The Belloy Formation reaches a maximum thickness of 274 metres (900 ft) in the Canadian Rockies foothills south of Fort St. John. It thins out towards the east and occurs in the sub-surface throughout the Peace River Country.
Relationship to other units
The Belloy Formation is disconformably overlain by Triassic or younger beds (Montney Formation, Fort St. John Group). It is unconformably overlies Mississippian sediments such as those of the Rundle Group.
The Belloy Formation is homotaxial with the Belcourt Formation and Kindle Formation of the Rocky Mountains.
References
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- ^ Page Module:Citation/CS1/styles.css has no content.Lexicon of Canadian Geologic Units. "Belloy Formation". Retrieved 2009-02-12.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Halbertsma, Henk Leendert, 1959. Nomenclature of Upper Carboniferous and Permian strata in the subsurface of the Peace River area; Canadian Society of Petroleum Geologists, Journal of the Alberta Society of Petroleum Geologists, vol. 7, no. 5 (May), pp.109-118.
- ^ Page Module:Citation/CS1/styles.css has no content.Naqvi, I.H. (1972). "The Belloy Formation (Permian), Peace River Area, Northern Alberta and Northeastern British Columbia". Bulletin of Canadian Petroleum Geology. 20 (1).
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