Rayoso Formation
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. 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. Fossil content. Indeterminate ceratosaurian remains located in Neuquén Province, Argentina.