The Ladd Formation is a Mesozoic geologic formation located in Orange County, California.

Ladd Formation
Stratigraphic range: Late Cretaceous
TypeGeological formation
Location
RegionCalifornia
CountryUnited States

Paleofauna

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Dinosaur remains (mainly hadrosaurid fragments) are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.[1] In 1927 Bernard Nettleton Moore found a hadrosaur maxilla with teeth while searching for ammonites in the formation. In 1950 Marlon V. Kirk found a plesiosaur centrum (spool of the vertebra). In 1978 Robert Drachuk, also while searching for ammonites, collected a hadrosaur cranial fragment from a limestone concretion. In 1992 Robert D. Hansen found the distal tibia of a hadrosaur.[2]

Vertebrates of the Moreno Formation
Genus Species Location Member Abundance Notes Images

Basilemys[3]

See also

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Footnotes

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  1. ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. ^ Hilton (2003), pp. 233-34, 241.
  3. ^ "Appendix: Summary of the Mesozoic Reptilian Fossils of California," in Hilton (2003) p. 277

References

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  • Hilton, Richard P. 2003. Dinosaurs and Other Mesozoic Reptiles of California. Berkeley: University of California Press. 318 pp.
  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.