| Rayoso Formation | |
| Type: | Geological formation |
| Period: | Aptian |
| Age: | Aptian-Albian, ~ |
| Prilithology: | Sandstone |
| Region: | Neuquén Province |
| Coordinates: | -38.4°N -69.9°W |
| Paleocoordinates: | -40.1°N -37.5°W |
| Unitof: | Huitrín-Rayoso Group |
| Subunits: | Pichi Neuquén Member |
| Underlies: | Lohan Cura & Carrín Cura Formations |
| Overlies: | La Amarga & Huitrín Formations |
| Thickness: | up to 604m (1,982feet) |
| Extent: | Neuquén Basin |
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.[1]
The formation has a maximum thickness of 604m (1,982feet) and has one member, the Pichi Neuquén Member. The unit comprises sandstones deposited in a lacustrine environment.[2]
Indeterminate ceratosaurian remains located in Neuquén Province, Argentina.
| Dinosaurs of the Rayoso Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Notes | Images | |
| Ceratosauria indet. | Indeterminate | Neuquén Province | |||
| Lavocatisaurus | L. agrioensis | Neuquén Province | Specimens representing several individuals at one site, including two juveniles and an adult | ||
| Rayososaurus | R. agrioensis | Neuquén Province | Two partial scapulae, most of the left femur, and the proximal half of the left fibula | ||