The Almond Formation is a geological formation of Late Cretaceous (Late Campanian-Early Maastrichtian) 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.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. Fossils from the Almond Formation include remains of dinosaursWeishampel, 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. . and plants.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.

Vertebrate paleofauna

Dinosaurs

Dinosaurs of the Almond Formation Genus Species Location Stratigraphic position Material Notes ImagesAnchiceratopsIndeterminateRepresents a new genus and species of unnamed ceratopsidDromaeosaurus"3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.IndeterminateEdmontoniaIndeterminateEdmontosaurusIndeterminateMaiasauraIndeterminateParonychodonP. lacustrisSaurolophusS. sp.One specimen (AMNH 3651) consisting of partial cranial and postcranial remains, as well as skin impressionsThescelosaurusListed as "cf. Thescelosaurus sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.IndeterminateUnnamed chasmosaurine ceratopsidListed as "?Anchiceratops sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.UnnamedMisidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form that is the sister taxon to Bisticeratops. Holotype was discovered in 1937.

Other vertebrates Non-dinosaur vertebrates found in the Almond Formation include crocodyliforms (indet.), turtles (Adocus cf. and Basilemys cf.), and ray-finned fish (Ichthyodectidae indet.).

See also

List of dinosaur-bearing rock formations

Footnotes

References Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. .