Rayoso Formation
The Rayoso Formation is a geological formation in the Neuquén Province of Argentina whose strata date back to the Aptian stage of the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.[1]
| Rayoso Formation Stratigraphic range: Aptian ~120–113 Ma | |
|---|---|
| Type | Geological formation |
| Unit of | Huitrín-Rayoso Group |
| Sub-units | Pichi Neuquén Member |
| Underlies | Lohan Cura & Carrín Cura Formations |
| Overlies | La Amarga & 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 |
| Lavocatisaurus | L. agrioensis | Neuquén Province | Specimens representing several individuals at one site, including two juveniles and an adult | |
See also
- List of dinosaur-bearing rock formations
References
- Weishampel et al., 2004, "Dinosaur distribution (Early Cretaceous, South America).", pp.570-571
- 3 km south of Agrio del Medio at Fossilworks.org
Bibliography
- Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
Further reading
 |
Wikimedia Commons has media related to Rayoso Formation. |
- 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
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