Rayoso Formation

Rayoso Formation
Stratigraphic range: Aptian-Albian,
~120–113 Ma
TypeGeological formation
Unit ofHuitrín-Rayoso Group
Sub-unitsPichi Neuquén Member
UnderliesLohan Cura & Carrín Cura Formations
OverliesLa Amarga & Huitrín Formations
Thicknessup to 604 m (1,982 ft)
Lithology
PrimarySandstone
Location
Coordinates38°24′S 69°54′W / 38.4°S 69.9°W / -38.4; -69.9
Approximate paleocoordinates40°06′S 37°30′W / 40.1°S 37.5°W / -40.1; -37.5
RegionNeuquén Province
Country Argentina
ExtentNeuquén Basin
Rayoso Formation is located in Argentina
Rayoso Formation
Rayoso Formation (Argentina)

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]

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

See also

References

  1. ^ a b Weishampel et al., 2004, "Dinosaur distribution (Early Cretaceous, South America).", pp.570-571
  2. ^ 3 km south of Agrio del Medio at Fossilworks.org

Bibliography

  • Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21

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