Angostura Colorada Formation

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°18′S 68°42′W / 41.3°S 68.7°W / -41.3; -68.7Coordinates: 41°18′S 68°42′W / 41.3°S 68.7°W / -41.3; -68.7
Approximate paleocoordinates 43°54′S 54°42′W / 43.9°S 54.7°W / -43.9; -54.7
Region Río Negro Province
Country  Argentina
Extent Neuquén Basin, North Patagonian Massif
Type section
Named by Volkhaimer
Year defined 1973

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]

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]

Paleofauna

See also

References

  1. 1 2 3 Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. ↑ Prez & Massaferro, 2013, p.223
  3. ↑ Ottone, 2009, p.377
  4. ↑ 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.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp.  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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