Fort Crittenden Formation

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Fort Crittenden Formation
Stratigraphic range: Late Cretaceous
Type Geological formation
Underlies Salero Formation
Location
Region North America
CountryUnited States

The Fort Crittenden Formation is a geological formation in Arizona whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. [1]

Contents

Vertebrate paleofauna

Amphibians

Amphibians of the Fort Crittenden Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotes

Opisthotriton

Indeterminate

Scapherpeton

Indeterminate

Archosaurs

Tyrannosauridae fossils attributed to Gorgosaurus have been unearthed here. [2] [3]

Archosaurs of the Fort Crittenden Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages

Alligatoridae

Indeterminate

Known only from a single scute.

Paleontologists Robert M. Sullivan and Spencer G. Lucas questioned the referral to this specimen to Allognathosuchus in the formation because the referred remains were so scant and Allognathosuchus is confined to the Paleogene. They regarded the referred scute as belonging to an indeterminate alligatoroid.

Crittendenceratops Crittendenceratops shaded.jpg
Crittendenceratops

Hadrosauridae [1] [4] [5] [6]

Indeterminate [1] [6]

These teeth were attributed to Trachodon mirabilis in the past.

Crittendenceratops

C. krzyzanowskii [7]

A centrosaurine ceratopsid.

cf. Richardoestesia

Indeterminate

Dromaeosauridae

Indeterminate

Bony fishes

Bony fishes of the Fort Crittenden Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages

Melvius

Indeterminate

Pachyrhizodus Pachyrhizodus caninus skeletons.JPG
Pachyrhizodus

Pachyrhizodus

Indeterminate

Cartilaginous fishes

Cartilaginous fishes of the Fort Crittenden Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotes

Myledaphus

M. bipartitus

Lepidosaurs

Teiid and anguid lizards are known from the formation.

Turtles

Turtles of the Fort Crittenden Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotes

Adocus

Aspideretes

Basilemys

Plastomenus

See also

Footnotes

  1. 1 2 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. 574–88. ISBN   0520242092.
  2. Miller, Halsey W. (1964). "Cretaceous Dinosaurian Remains from Southern Arizona". Journal of Paleontology. 38 (2): 378–384. ISSN   0022-3360.
  3. Heckert, Andrew B.; Lucas, Spencer G.; Krzyzanowski, Stan E. (2003-04-10). "Vertebrate fauna of the late Campanian (Judithian) Fort Crittenden Formation, and the age of Cretaceous vertebrate faunas of southeastern Arizona (U.S.A.)" . Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 227 (3): 343–364. doi:10.1127/njgpa/227/2003/343. ISSN   0077-7749.
  4. D’Emic, M.D., Wilson, J.A., and Thompson, R. 2010. "The end of the sauropod dinosaur hiatus in North America". Palaeogeography, Palaeoclimatology, Palaeoecology 297: 486–90.
  5. Heckert, Andrew B.; Lucas, Spencer G.; Krzyzanowski, Stan E. (2003-04-10). "Vertebrate fauna of the late Campanian (Judithian) Fort Crittenden Formation, and the age of Cretaceous vertebrate faunas of southeastern Arizona (U.S.A.)" . Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 227 (3): 343–364. doi:10.1127/njgpa/227/2003/343. ISSN   0077-7749.
  6. 1 2 Miller, Halsey W. (1964). "Cretaceous Dinosaurian Remains from Southern Arizona". Journal of Paleontology. 38 (2): 378–384. ISSN   0022-3360.
  7. Sebastian G. Dalman; John-Paul M. Hodnett; Asher J. Lichtig; Spencer G. Lucas (2018). "A new ceratopsid dinosaur (Centrosaurinae: Nasutoceratopsini) from the Fort Crittenden Formation, Upper Cretaceous (Campanian) of Arizona". New Mexico Museum of Natural History and Science Bulletin. 79: 141–64.

References

31°49′24″N110°38′25″W / 31.8234°N 110.6404°W / 31.8234; -110.6404