Almond Formation
| Almond Formation | |
|---|---|
| Stratigraphic range: Campanian–Maastrichtian | |
| Type | Geological formation |
| Underlies | Lewis Shale |
| Overlies | Ericson Formation |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone, shale, coalb |
| Location | |
| Region | Wyoming |
| Country | United States |
The Almond Formation is a geological formation of Late Cretaceous (Late Campanian-Early Maastrichtian[1]) age in Wyoming. It was deposited in marsh, deltaic, lagoonal, estuarine, and shallow marine environments along the western shore of the Western Interior Seaway. It consists primarily of fine- to medium-grained sandstone, siltstone, shale, and coal.[2] Fossils from the Almond Formation include remains of dinosaurs[3] and plants.[4]
Vertebrate paleofauna
[edit | edit source]Dinosaurs
[edit | edit source]Color key
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Notes Uncertain or tentative taxa are in small text; |
| Dinosaurs of the Almond Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|
Indeterminate |
Represents a new genus and species of unnamed ceratopsid |
   | ||||
|
Indeterminate[5] |
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|
Indeterminate[5] |
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|
Indeterminate[5] |
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|
Indeterminate[5] |
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|
P. lacustris[5] |
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| Saurolophus[6] | S. sp. | One specimen (AMNH 3651) consisting of partial cranial and postcranial remains, as well as skin impressions | ||||
|
Indeterminate[7] |
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|
Unnamed chasmosaurine ceratopsid[8] |
Unnamed |
Misidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form that is the sister taxon to Bisticeratops.[9] Holotype was discovered in 1937. | ||||
Other vertebrates
[edit | edit source]Non-dinosaur vertebrates found in the Almond Formation include crocodyliforms (indet.), turtles (Adocus cf. and Basilemys cf.), and ray-finned fish (Ichthyodectidae indet.).[10]
See also
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Footnotes
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Kieft, R.L., Hampton, G.J., Jackson, C.A.-L., and Larsen, E., 2011. Stratigraphic architecture of a net-transgressive marginal- to shallow-marine succession: Upper Almond Formation, Rock Springs Uplift, Wyoming, U.S.A. Journal of Sedimentary Research, vol. 81, p. 513-533.
- ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 574-588. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)..
- ^ Stockey, R.A., Rothwell, G.W., and Johnson, K.R., 2007. Cobbania corrugata gen. et. comb. nov. (Araceae): A floating aquatic monocot from the Upper Cretaceous of western North America. American Journal of Botany, vol. 94, no. 4, p. 609-624.
- ^ a b c d e f g h i j "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Listed as "cf. Thescelosaurus sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.
- ^ Listed as "?Anchiceratops sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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References
[edit | edit source]- Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)..
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