Kaskapau Formation: Difference between revisions
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== Geographical distribution == |
== Geographical distribution == |
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[[File:Kaskapau-Pouce Coupe River.JPG|thumb|left|200px|Kaskapau shale exposed along the [[Pouce Coupe River]] ]] |
[[File:Kaskapau-Pouce Coupe River.JPG|thumb|left|200px|Kaskapau shale exposed along the [[Pouce Coupe River]] ]] |
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The formation is {{convert|170|m|ft|sp=us}} thick in the [[Peace River (Canada)|Peace River]] and [[Smoky River]] area, and thickens up to {{convert|900|m|ft|sp=us}}<ref name=lexicon>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:007398|title=Kaskapau Formation|author=Lexicon of Canadian Geological Units|accessdate=2009-02-06|archive-url=https://archive. |
The formation is {{convert|170|m|ft|sp=us}} thick in the [[Peace River (Canada)|Peace River]] and [[Smoky River]] area, and thickens up to {{convert|900|m|ft|sp=us}}<ref name=lexicon>{{Cite web|url=http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:007398|title=Kaskapau Formation|author=Lexicon of Canadian Geological Units|accessdate=2009-02-06|archive-url=https://archive.today/20130111221415/http://cgkn1.cgkn.net/weblex/weblex_litho_detail_e.pl?00053:007398|archive-date=2013-01-11|url-status=dead}}</ref> in the foothills of the [[Northern Rocky Mountains]] in [[British Columbia]]. It is exposed along the Peace River near [[Dunvegan, Alberta|Dunvegan]], as well as in the Smoky River area. |
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The formation is part of the [[Smoky River Group]], and is conformably overlain by the [[Bad Heart Formation]] in the western area, and [[unconformity|unconformably]] by the [[Cardium Formation]] in the [[Pouce Coupe River]] area. It is conformable underlain by the [[Dunvegan Formation]].<ref name=lexicon/> |
The formation is part of the [[Smoky River Group]], and is conformably overlain by the [[Bad Heart Formation]] in the western area, and [[unconformity|unconformably]] by the [[Cardium Formation]] in the [[Pouce Coupe River]] area. It is conformable underlain by the [[Dunvegan Formation]].<ref name=lexicon/> |
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== Paleontology == |
== Paleontology == |
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[[Oyster]] fossils are encountered at the base of the formation, and [[Inoceramus]] fragments (such as ''I. labiatus'') are found throughout the entire stack. [[Ammonite]]s 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 [[Benthic zone|benthonic]] (and fewer [[planktonic]]) [[foraminifera]]. |
[[Oyster]] fossils are encountered at the base of the formation, and [[Inoceramus]] fragments (such as ''I. labiatus'') are found throughout the entire stack. [[Ammonite]]s 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 [[Benthic zone|benthonic]] (and fewer [[planktonic]]) [[foraminifera]]. An indeterminate hadrosaurid and a possible nodosaurid are known from Quality Creek.<ref>{{cite journal |last1=Reid |first1=Ian J. |title=A review of dinosaur body fossils from British Columbia, Canada |journal=PeerJ Preprints |date=2016 |doi=10.7287/peerj.preprints.1369v3 |doi-access=free }}</ref> |
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== References == |
== References == |
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{{WCSB|Northwest_Plains=yes}} |
{{WCSB|Northwest_Plains=yes}} |
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[[Category: |
[[Category:Geologic formations of Alberta]] |
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[[Category: |
[[Category:Geologic formations of British Columbia]] |
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[[Category:Upper Cretaceous Series of North America]] |
[[Category:Upper Cretaceous Series of North America]] |
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[[Category:Cretaceous Alberta]] |
[[Category:Cretaceous Alberta]] |
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[[Category:Coniacian Stage]] |
[[Category:Coniacian Stage]] |
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[[Category:Turonian Stage]] |
[[Category:Turonian Stage]] |
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[[Category:Shale formations]] |
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Latest revision as of 18:45, 16 September 2023
| Kaskapau Formation | |
|---|---|
| Stratigraphic range: Turonian-Coniacian ~ | |
 Kaskapau Shale | |
| Type | Geological formation |
| Unit of | Smoky River Group |
| Sub-units | Doe Creek, Pouce Coupe, Wartenbe, Tuskoola |
| Underlies | Bad Heart & Cardium Formations |
| 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 |
| Region | Western Canadian Sedimentary Basin |
| Country |  Canada |
| Type section | |
| Named for | Kaskapau Ricer |
| Named by | McLearn |
| Year defined | 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
[edit]
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
[edit]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
[edit]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. An indeterminate hadrosaurid and a possible nodosaurid are known from Quality Creek.[4]
References
[edit]- ^ 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.
- ^ a b Lexicon of Canadian Geological Units. "Kaskapau Formation". Archived from the original on 2013-01-11. Retrieved 2009-02-06.
- ^ Reid, Ian J. (2016). "A review of dinosaur body fossils from British Columbia, Canada". PeerJ Preprints. doi:10.7287/peerj.preprints.1369v3.