Almond Formation

From Wikipedia, the free encyclopedia
Almond Formation
Stratigraphic range: 73.6–71.1 Ma
↓
TypeGeological formation
UnderliesLewis Shale
Overlies
Lithology
PrimarySandstone
OtherSiltstone, shale, coal
Location
RegionWyoming
CountryUnited States
Southwestern Wyoming Upper Cretaceous Unit cross section.jpg
Southwestern Wyoming, incl. Almond formation

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[]

Dinosaurs[]

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
Dinosaurs of the Almond Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Anchiceratops

Indeterminate

Represents a new genus and species of unnamed ceratopsid

Dromaeosaurus
Edmontonia
Edmontosaurus
Thescelosaurus

Dromaeosaurus[5]

Indeterminate[5]

Edmontonia[5]

Indeterminate[5]

Edmontosaurus[5]

Indeterminate[5]

Maiasaura[5]

Indeterminate[5]

Paronychodon[5]

P. lacustris[5]

Thescelosaurus[6]

Indeterminate[6]

Unnamed ceratopsid[7]

Unnamed

Misidentified as Anchiceratops, it is actually a new species of Pentaceratops-like form

See also[]

  • List of dinosaur-bearing rock formations

Footnotes[]

  1. ^ Fowler, Denver Warwick (2017-11-22). "Revised geochronology, correlation, and dinosaur stratigraphic ranges of the Santonian-Maastrichtian (Late Cretaceous) formations of the Western Interior of North America". PLOS ONE. 12 (11): e0188426. Bibcode:2017PLoSO..1288426F. doi:10.1371/journal.pone.0188426. ISSN 1932-6203. PMC 5699823. PMID 29166406.
  2. ^ 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.
  3. ^ 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. ISBN 0-520-24209-2.
  4. ^ 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.
  5. ^ Jump up to: 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.
  6. ^ Jump up to: a b Listed as "cf. Thescelosaurus sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.
  7. ^ Listed as "?Anchiceratops sp." in "3.12 Wyoming, United States; 4. Almond Formation," in Weishampel, et al. (2004). Page 584.

References[]

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.

Retrieved from ""