Turney Ranch Formation

Turney Ranch Formation
Turney Ranch Formation
Stratigraphic range: Albian–Cenomanian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Location
Region	Arizona
Country	USA

The Turney Ranch Formation is a mid-Cretaceous geological formation in the United States. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[1]

Fossil content

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

Sauropod

Sauropods of the Turney Ranch Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Sonorasaurus^[2]	S. thompsoni	Whetstone Mountains of southeastern Arizona		A partial skeleton	A brachiosaurid sauropod

Theropods

Theropods of the Turney Ranch Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Acrocanthosaurus^[3]	A. atokensis			Teeth	A carcharodontosaurid theropod

Footnotes

↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
↑ Ratkevich, R. (1998). "New Cretaceous brachiosaurid dinosaur, Sonorasaurus thompsoni gen. et sp. nov, from Arizona". Journal of the Arizona-Nevada Academy of Science. 31 (1): 71–82.
↑ Oswald, T.; Boisvert, C.; D'amore, D.; Curtice, B. (2025). ""Here be Dragons": Shed Teeth Potentially Indicate the Presence of Multiple Unidentified Allosauroids from the Early Cretaceous Cedar Mountain Formation of Utah". Journal of the Arizona-Nevada Academy of Science. 50 (2): 55–129. doi:10.2181/036.050.0204.

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.

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[dinosaurdistribution-1] Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.

[2] Ratkevich, R. (1998). "New Cretaceous brachiosaurid dinosaur, Sonorasaurus thompsoni gen. et sp. nov, from Arizona". Journal of the Arizona-Nevada Academy of Science. 31 (1): 71–82.

[3] Oswald, T.; Boisvert, C.; D'amore, D.; Curtice, B. (2025). ""Here be Dragons": Shed Teeth Potentially Indicate the Presence of Multiple Unidentified Allosauroids from the Early Cretaceous Cedar Mountain Formation of Utah". Journal of the Arizona-Nevada Academy of Science. 50 (2): 55–129. doi:10.2181/036.050.0204.

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