Angostura Colorada Formation
The Angostura Colorada Formation is a Campanian to Maastrichtian geologic formation of the Neuquén Basin and North Patagonian Massif in the Río Negro Province of Argentina. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.[1]
| Angostura Colorada Formation Stratigraphic range: Campanian-Maastrichtian | |
|---|---|
| Type | Geological formation |
| Underlies | Coli Toro Member, Huitrera & Collón Cura Formations |
| Overlies | Sañicó Formation |
| Lithology | |
| Primary | Sandstone, claystone, conglomerate |
| Location | |
| Coordinates | 41.3°S 68.7°W |
| Approximate paleocoordinates | 43.9°S 54.7°W |
| Region | Río Negro Province |
| Country |  Argentina |
| Extent | Neuquén Basin, North Patagonian Massif |
| Type section | |
| Named by | Volkhaimer |
| Year defined | 1973 |
  Angostura Colorada Formation (Argentina) | |
Description
The Angostura Colorada Formation was defined by Volkhaimer in 1973 and unconformably overlies the Late Triassic volcanics of the Sañicó Formation. The formation is partly overlain by the Huitrera and Collón Cura Formations,[2] and in other parts by the Coli Toro Member of the Los Alamitos Formation.[3] The formation, outcropping south of Comallo, comprises sandstones, claystones and conglomerates deposited in a fluvial environment.[4]
See also
- List of dinosaur-bearing rock formations
References
- Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- Prez & Massaferro, 2013, p.223
- Ottone, 2009, p.377
- Prez & Massaferro, 2013, p.225
Bibliography
- Ottone, Eduardo G. 2009. La flora cretácica de Cuenca Neuquina, su significado paleoambiental y paleoclimático. Revista de la Asociación Geológica Argentina 65. 373–386. Accessed 2018-09-08.
- Prez, Horacio, and Gabriela Massaferro. 2013. Geología y geomorfología del tramo superior del Arroyo Comallo, Río Negro. Contribuciones Científicas GÆA 26. 221–234. Accessed 2018-09-08.
- 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
- J. E. Powell. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part VI—the titanosaurids. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):147-153
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