Angostura Colorada Formation
Angostura Colorada Formation
Stratigraphic range : Campanian -Maastrichtian
Overlies Sañicó Formation
Lithology
Location
Coordinates 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
Country Argentina
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.
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 , and in other parts by the Coli Toro Formation . The formation, outcropping south of Comallo , comprises sandstones , claystones and conglomerates deposited in a fluvial environment .
Fossil content Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Dinosaurs Ornithischians Ornithischians of the Angostura Colorada FormationGenus Species Location Stratigraphic position Material Notes Image Hadrosauridae Indet.Indeterminate Parankylosauria Indet.Indeterminate
Sauropods Sauropods of the Angostura Colorada FormationGenus Species Location Stratigraphic position Material Notes Images Aeolosaurus A. rionegrinus A aeolosaurin lithostrotian Lithostrotia Indet.Indeterminate Saltasaurinae Indet.Indeterminate
Theropods Theropods of the Angostura Colorada FormationGenus Species Location Stratigraphic position Material Notes Images Abelisauridae Indet.Indeterminate
See also Bibliography Ottone, Eduardo G (2009), (PDF), Revista de la Asociación Geológica Argentina 65 : 373–386 Prez, Horacio; Massaferro, Gabriela (2013), (PDF), Contribuciones Científicas GÆA , 26 : 221–234 Weishampel, David B. ; Dodson, Peter ; Osmólska, Halszka (2004), , Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2{{citation}}: CS1 maint: publisher location (link)Cruzado-Caballero, P. (2017). . Journal of Iberian Geology . 43 (2): 307–318. Bibcode :. doi :. hdl :. Zurriaguz, Virginia; Martinelli, Agustín; Rougier, Guillermo W.; Ezcurra, Martín D.; Manabe, Makoto; Tsuihiji, Takanobu; Novas, Fernando E. (2017). . Cretaceous Research . 75 : 101–114. Bibcode :. doi :. hdl :. 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