Coordinates: Page Module:Coordinates/styles.css has no content.49°37′41″N 112°53′23″W / 49.62806°N 112.88972°W
Oldman Formation
From Wikipedia, the free encyclopedia
Page Module:Infobox/styles.css has no content.
| Oldman Formation | |
|---|---|
| Stratigraphic range: Campanian, | |
| Type | Geological formation |
| Unit of | Belly River Group |
| Underlies | Dinosaur Park Formation |
| Overlies | Foremost Formation |
| Thickness | up to 328 feet (100 m)[1] |
| Lithology | |
| Primary | Sandstone |
| Other | Mudstone and bentonite |
| Location | |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | Western Canada Sedimentary Basin |
| Country | File:Flag of Canada (Pantone).svg Canada |
| Type section | |
| Named for | Oldman River |
| Named by | Russell, L.S. and Landes, R.W. |
| Year defined | 1940[2] |
| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. | |
Script error: No such module "Check for conflicting parameters".
The Oldman Formation is a stratigraphic unit of Late Cretaceous (Campanian stage) age that underlies much of southern Alberta, Canada. It consists primarily of sandstones that were deposited in fluvial channel and floodplain environments. It was named for exposures along the Oldman River between its confluence with the St. Mary River and the city of Lethbridge, and it is known primarily for its dinosaur remains and other fossils.[3]
Lithology
The Oldman Formation is composed primarily of light-colored, fine-grained sandstones. They are upward-fining, lenticular to sheet-like bodies that are yellowish, steep-faced and blocky in outcrop. The formation also includes lesser amounts of siltstone and mudstone.[4]
Depositional environments
The sediments of the Oldman Formation were deposited in fluvial channels (the sandstones) and a variety of channel margin, overbank and floodplain environments (the siltstones and mudstones). The formation is about 40 metres (130 ft) thick at Dinosaur Provincial Park in southeastern Alberta. It thickens toward the southwest, and northwestern Montana appears to have been the primary source of the sediments.[4]
Relationship to other units
The Oldman Formation is a member of the Belly River Group (also known as the Judith River Group). It conformably overlies the Foremost Formation, and is separated from the overlying Dinosaur Park Formation by a regional disconformity. The sediments of the Oldman are superficially similar to those of the Dinosaur Park, which was included in the Oldman Formation prior to the recognition of the disconformity. The two formations can also be distinguished by petrographic and sedimentologic differences.[3][4] In Central Montana, The Oldman Formation is equivalent to the upper part of the Mclelland Ferry Member, as well as the Woodhawk and Coal Ridge Members of the Judith River Formation.[5] It is also believed to be equivalent to parts of the Two Medicine Formation in Western Montana.[6]
Age
The Oldman Formation was deposited during the middle Campanian, between about 77.5 and 76.5 million years ago.[7] It lies fully within magnetic polarity Chron 33n.[8]
Fossil content
List of dinosaurs found in the formation:[7][9]
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Theropods
| Theropods of the Oldman Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Gorgosaurus | G.sp. | Stratigraphic reassessment of material assigned to Gorgosaurus suggests there is a currently unnamed albertosaurine in the Oldman Formation[10] | ||||
| Daspletosaurus | D. torosus | Lower | Several specimens with a complete skeleton | A tyrannosaurid | ||
| D. wilsoni[11] | Upper | Two skulls with associated postcrania | A tyrannosaurid | |||
| Dromaeosaurus | Indeterminate | Teeth | A dromaeosaurid | |||
| cf. Hesperonychus[12] | Indeterminate | Foot claw | A dromaeosaurid or an avialan[13] | |||
| Paronychodon | Indeterminate | Teeth | A troodontid | |||
| Prismatoolithus[14] | P. levis | Partial clutch containing 12 eggs | ||||
| Richardoestesia | R. isosceles | Misreported | ||||
| Indeterminate | Teeth | A dromaeosaurid | ||||
| Saurornitholestes | S. langstoni | Partial remains | A dromaeosaurid | |||
| Troodon | Dubious | Teeth, eggs, embryos | A dubious taxon of troodontid, most specimens formerly considered Troodon have been reassigned to other genera such as Stenonychosaurus | |||
| Struthiomimus | S. altus | Several specimens, including a nearly complete skeleton[15] | An ornithomimid | |||
Ornithischians
See also
- List of fossil sites (with link directory)
- List of dinosaur-bearing rock formations
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content.Lexicon of Canadian Geological Units. "Oldman Formation". Retrieved 2009-02-06.
{{cite web}}: CS1 maint: deprecated archival service (link) - ^ Russell, L.S. and Landes, R.W., 1940. Geology of the southern Alberta Plains; Geological Survey of Canada, Memoir 221.
- ^ a b Eberth, D.A. and Hamblin A.P. 1993. Tectonic, stratigraphic, and sedimentologic significance of a regional discontinuity in the upper Judith River Group (Belly River wedge) of southern Alberta, Saskatchewan, and northern Montana. Canadian Journal of Earth Sciences 30: 174-200.
- ^ a b c Eberth, D.A. 2005. The geology. In: Currie, P.J., and Koppelhus, E.B. (eds), Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed. Indiana University Press: Bloomington and Indianapolis, p. 54-82. Template:ISBN.
- ^ Page Module:Citation/CS1/styles.css has no content.Chinzorig, Tsogtbaatar; Takasaki, Ryuji; Chiba, Kentaro; Fiorillo, Anthony R.; Kobayashi, Yoshitsugu; Saneyoshi, Mototaka; Ishigaki, Shinobu (2025-09-10). "A potential deinocheirid ornithomimosaur from the Judith River Formation (Upper Cretaceous: Montana, U.S.A.) and its paleobiogeographic implications". Journal of Vertebrate Paleontology. e2536844: (13 pages). doi:10.1080/02724634.2025.2536844.
- ^ Page Module:Citation/CS1/styles.css has no content.Fowler, Elizabeth A. Freedman; Horner, John R. "A New Brachylophosaurin Hadrosaur (Dinosauria: Ornithischia) with an Intermediate Nasal Crest from the Campanian Judith River Formation of Northcentral Montana". PLOS One. 10 (11) e0141304. doi:10.1371/journal.pone.0141304. PMC 4641681.
- ^ a b Page Module:Citation/CS1/styles.css has no content.Arbour, V.M.; Burns, M. E.; Sissons, R. L. (2009). "A redescription of the ankylosaurid dinosaur Dyoplosaurus acutosquameus Parks, 1924 (Ornithischia: Ankylosauria) and a revision of the genus". Journal of Vertebrate Paleontology. 29 (4): 1117–1135. Bibcode:2009JVPal..29.1117A. doi:10.1671/039.029.0405.
- ^ Lerbekmo, J.F. 1989. The position of the 33-33r (Campanian) polarity chron boundary in southeastern Alberta. Bulletin of Canadian Petroleum Geology 37: 43-47.
- ^ Weishampel, D.B., Barrett, P.M., Coria, R.A., Le Loueff, J., Xu X., Zhao X., Sahni, A., Gomani, E.M.P., & Noto, C.N. 2004. Dinosaur distribution. In: Weishampel, D.B., Dodson, P., & Osmólska, H. (Eds.). The Dinosauria (2nd Edition). Berkeley: University of California Press. Pp. 517-606.
- ^ Page Module:Citation/CS1/styles.css has no content.Coppock, C.; Voris, J.; Powers, M.; Currie, P. (2025). "Taxonomic and biostratigraphic revision of tyrannosaurids from the Belly River Group of Alberta, Canada: insights into evolutionary history of Albertosaurinae" (PDF). Society of Vertebrate Paleontology.
- ^ Page Module:Citation/CS1/styles.css has no content.Warshaw, Elías A.; Guevara, Daniela Barrera; Fowler, Denver W. (2024-11-01). "Anagenesis and the tyrant pedigree: A response to "Re-analysis of a dataset refutes claims of anagenesis within Tyrannosaurus-line tyrannosaurines (Theropoda, Tyrannosauridae)"". Cretaceous Research. 163 105957. doi:10.1016/j.cretres.2024.105957. ISSN 0195-6671.
- ^ Page Module:Citation/CS1/styles.css has no content.Longrich, N.R.; Currie, P.J. (2009). "A microraptorine (Dinosauria–Dromaeosauridae) from the Late Cretaceous of North America". Proceedings of the National Academy of Sciences. 106 (13): 5002–5007. Bibcode:2009PNAS..106.5002L. doi:10.1073/pnas.0811664106. PMC 2664043. PMID 19289829.
- ^ Page Module:Citation/CS1/styles.css has no content.Hartman, Scott; Mortimer, Mickey; Wahl, William R.; Lomax, Dean R.; Lippincott, Jessica; Lovelace, David M. (2019-07-10). "A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight". PeerJ. 7 e7247. doi:10.7717/peerj.7247. ISSN 2167-8359. PMC 6626525. PMID 31333906.
- ^ Page Module:Citation/CS1/styles.css has no content.Zelenitsky, Darla K.; Hills, L.V. (1996). "An egg clutch of Prismatoolithus levis oosp. nov. from the Oldman Formation (Upper Cretaceous), Devil's Coulee, southern Alberta". Canadian Journal of Earth Sciences. 33 (8): 1127–1131. Bibcode:1996CaJES..33.1127Z. doi:10.1139/e96-085.
- ^ Page Module:Citation/CS1/styles.css has no content.Claessens, L.; Loewen, Mark A. (2015). "A redescription of Ornithomimus velox Marsh, 1890 (Dinosauria, Theropoda)". Journal of Vertebrate Paleontology. 36 e1034593. doi:10.1080/02724634.2015.1034593.
- ^ a b Page Module:Citation/CS1/styles.css has no content.Brown, C. M.; Evans, D. C.; Ryan, M. J.; Russell, A. P. (2013). "New data on the diversity and abundance of small-bodied ornithopods (Dinosauria, Ornithischia) from the Belly River Group (Campanian) of Alberta". Journal of Vertebrate Paleontology. 33 (3): 495. Bibcode:2013JVPal..33..495B. doi:10.1080/02724634.2013.746229.
- ^ Page Module:Citation/CS1/styles.css has no content.Woodruff, D Cary; Horner, John R; Goodwin, Mark B; Evans, David C (2025-10-01). "The first pachycephalosaurid from the Late Cretaceous Two Medicine Formation: effects of the Western Interior Seaway on North American pachycephalosaurid evolution". Zoological Journal of the Linnean Society. 205 (2). doi:10.1093/zoolinnean/zlaf087. ISSN 0024-4082.
- ^ Page Module:Citation/CS1/styles.css has no content.Sullivan, R.M. (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria: Ornithischia)" (PDF). In Lucas, S.G.; Sullivan, R.M. (eds.). Late Cretaceous vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin. Vol. 35. pp. 347–365.
- ^ Page Module:Citation/CS1/styles.css has no content.Ryan, M.J.; Micucci, L.; Rizo, H.; Sullivan, C.; Lee, Y.-N.; Evans, D.C. (2023). "A New Late Cretaceous leptoceratopsid (Dinosauria: Ceratopsia) from the Oldman Formation (Campanian) of Alberta, Canada". In Lee, Y.-N. (ed.). Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Prof. Louis L. Jacobs. Seoul: Dinosaur Science Center Press. pp. 151–165. ISBN 978-89-5708-358-1.
- ^ Page Module:Citation/CS1/styles.css has no content.Dyer, Aaron D.; Powers, Mark J.; Currie, Philip J. (2023). "Problematic putative pachycephalosaurids: Synchrotron µCT imaging shines new light on the anatomy and taxonomic validity of Gravitholus albertae from the Belly River Group (Campanian) of Alberta, Canada". Vertebrate Anatomy Morphology Palaeontology. 10 (1): 65–110. doi:10.18435/vamp29388. ISSN 2292-1389.
- ^ Page Module:Citation/CS1/styles.css has no content.McFeeters, Bradley D.; Evans, David C.; Ryan, Michael J.; Maddin, Hillary C. (22 December 2020). "First occurrence of Maiasaura (Dinosauria, Hadrosauridae) from the Upper Cretaceous Oldman Formation of southern Alberta, Canada". Canadian Journal of Earth Sciences. 58 (3): 286–296. doi:10.1139/cjes-2019-0207.
Bibliography
- D.A. Eberth. 1996. Origin and significance of mud-filled incised valleys (Upper Cretaceous) in southern Alberta, Canada. Sedimentology 43:459–477
- Ryan, M. J., and Russell, A. P., 2001. Dinosaurs of Alberta (exclusive of Aves): In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 279–297
Lua error in package.lua at line 80: module 'Module:Navbox/configuration' not found.
.svg){kind=link}
