Earth:Williams Fork Formation
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Short description: Geological Formation in Colorado
| Williams Fork Formation Stratigraphic range: Campanian (Edmontonian) ~84–71 Ma | |
|---|---|
| Type | Geological formation |
| Unit of | Mesaverde Group |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone |
| Location | |
| Coordinates | [ ⚑ ] : 40°00′N 108°48′W / 40.0°N 108.8°W |
| Paleocoordinates | [ ⚑ ] 47°30′N 80°18′W / 47.5°N 80.3°W |
| Region | Colorado |
| Country |  United States |
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The Williams Fork Formation is a Campanian (Edmontonian) geologic formation of the Mesaverde Group in Colorado. Dinosaur remains are among the fossils that have been recovered from the formation, most notably Pentaceratops sternbergii,[1]. Other fossils found in the formation are the ammonite Lewyites, neosuchian crocodylomorphs, and the mammals Glasbius and Meniscoessus collomensis.[2][3]
See also
- List of dinosaur-bearing rock formations
- List of stratigraphic units with indeterminate dinosaur fossils
References
- ↑ Diem, Steve; Archibald, James D. (2005). "Range extension of southern chasmosaurine Ceratopsian dinosaurs into northwestern Colorado". Journal of Paleontology 79 (2): 251–258. doi:10.1666/0022-3360(2005)079<0251:REOSCC>2.0.CO;2. https://www.cambridge.org/core/journals/journal-of-paleontology/article/range-extension-of-southern-chasmosaurine-ceratopsian-dinosaurs-into-northwestern-colorado/27F4029AED9999BD1238D6D450BF4277. Retrieved 21 September 2016.
- ↑ Jubb Creek at Fossilworks.org
- ↑ Rangely South (SDNHM) at Fossilworks.org
Bibliography
- Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN:0-520-24209-2
Further reading
- J. R. Foster and R. K. Hunt-Foster. 2015. First report of a giant neosuchian (Crocodyliformes) in the Williams Fork Formation (Upper Cretaceous: Campanian) of Colorado. Cretaceous Research 55:66-73
- W. J. Kennedy, W. A. Cobban, and G. R. Scott. 2000. Heteromorph ammonites from the Upper Campanian (Upper Cretaceous) Baculites cuneatus and Baculites reesidei zones of the Pierre Shale in Colorado, USA. Acta Geologica Polonica 50:1-20
- J. A. Lillegraven. 1987. Stratigraphic and evolutionary implications of a new species of Meniscoessus (Multituberculata, Mammalia) from the Upper Cretaceous Williams Fork Formation, Moffat County, Colorado. Dakoterra 3:46-56
- Sullivan, R.M., and Lucas, S.G. 2006. "The Kirtlandian land-vertebrate "age" – faunal composition, temporal position and biostratigraphic correlation in the nonmarine Upper Cretaceous of western North America." New Mexico Museum of Natural History and Science, Bulletin 35:7-29.
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