Ladd Formation

Geologic formation in California, United States

Ladd Formation

Stratigraphic range: Late Cretaceous
Type| Geological formation
Location
Region| California
Country| United States

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

## 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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* Earth sciences portal
* Paleontology portal
* Dinosaurs portal

* List of dinosaur-bearing rock formations
* List of stratigraphic units with indeterminate dinosaur fossils

## Notes

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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.

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