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.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
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,Prez & Massaferro, 2013, p.223 and in other parts by the Coli Toro Formation.Ottone, 2009, p.377 The formation, outcropping south of Comallo, comprises sandstones, claystones and conglomerates deposited in a fluvial environment.Prez & Massaferro, 2013, p.225
Fossil content
Dinosaurs
Ornithischians Ornithischians of the Angostura Colorada FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImage Hadrosauridae indet. Indeterminate
Sauropods Sauropods of the Angostura Colorada Formation Genus 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 Formation Genus Species Location Stratigraphic position Material Notes Images Abelisauridae indet. Indeterminate
See also List of dinosaur-bearing rock formations List of stratigraphic units with few dinosaur genera
References
Bibliography
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