Rayoso Formation
Geological formation in the Neuquén Province of Argentina
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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]
Unit ofHuitrín-Rayoso Group
Sub-unitsPichi Neuquén Member
UnderliesLohan Cura and Carrín Cura Formations
| Rayoso Formation | |
|---|---|
| Stratigraphic range: Aptian-Albian, ~ | |
| Type | Geological formation |
| Unit of | Huitrín-Rayoso Group |
| Sub-units | Pichi Neuquén Member |
| Underlies | Lohan Cura and Carrín Cura Formations |
| Overlies | La Amarga and Huitrín Formations |
| Thickness | up to 604 m (1,982 ft) |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Coordinates | 38.4°S 69.9°W |
| Approximate paleocoordinates | 40.1°S 37.5°W |
| Region | Neuquén Province |
| Country | Argentina |
| Extent | Neuquén Basin |
  Rayoso Formation (Argentina) | |
Description
The formation has a maximum thickness of 604 metres (1,982 ft) and has one member, the Pichi Neuquén Member. The unit comprises sandstones deposited in a lacustrine environment.[2]
Fossil content
Indeterminate ceratosaurian remains located in Neuquén Province, Argentina.[1]
| 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 | |
