The Rayoso Formation is a geological formation in the Neuquén Province of Argentina whose strata date back to the Aptian-Albian stages of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel et al., 2004, "Dinosaur distribution (Early Cretaceous, South America).", pp.570-571
Description The formation has a maximum thickness of and has one member, the Pichi Neuquén Member. The unit comprises sandstones deposited in a lacustrine environment.3 km south of Agrio del Medio at Fossilworks.org
Fossil content Indeterminate ceratosaurian remains located in Neuquén Province, Argentina.
Dinosaurs of the Rayoso Formation Genus Species Presence Notes ImagesCeratosauria indet.IndeterminateNeuquén Province Lavocatisaurus L. agrioensis Neuquén Province Specimens representing several individuals at one site, including two juveniles and an adult RayososaurusR. agrioensisNeuquén ProvinceTwo partial scapulae, most of the left femur, and the proximal half of the left fibula
See also List of dinosaur-bearing rock formations
References
Bibliography
Further reading
J. F. Bonaparte. 1996. Cretaceous tetrapods of Argentina. Münchner Geowissenschaften Abhandlungen 30:73-130 L. Salgado, J. I. Canudo, A. C. Garrido and J. L. Carballido. 2012. Evidence of gregariousness in rebbachisaurids (Dinosauria, Sauropoda, Diplodocoidea) from the Early Cretaceous of Neuquén (Rayoso Formation), Patagonia, Argentina. Journal of Vertebrate Paleontology 32(3):603-613