DOI: http://dx.doi.org/10.5027/andgeoV49n1-3316

New fossiliferous sites and late cenozoic paleoenvironmental evolution of southwestern Córdoba, Argentina.

Adan Alejo Tauber, Federico Álvarez, Gastón Martínez, Augusto Haro, Jerónimo Krapovickas, Gastón Nieto

Abstract


New fossil remains were found in Neogene and quaternary sedimentary sequences exposed in Alpa Corral and río San Bartolomé localities (Rio Cuarto Department, Córdoba, Argentina). They were assigned to Nopachtus cabrerai (Xenarthra, Cingulata, Glyptodontidae), Notiomastodon platensis (Proboscidea, Gomphotheriidae) and cf. Trigodon gaudryi (Notoungulata, Toxodontidae), and traces of the Scoyenia ichnofacies, as Taenidium barretti, were identified. Based on these findings, we conclude that: 1, the species Nopachtus cabrerai and cf. Trigodon gaudryi are registered for the first time in the Sierras Pampeanas region and support (along with the rest of the known taxa) a clear faunistic similarity to the Pampean region; 2, the beginning of the Neogene sedimentation in the Alpa Corral area (Las Barrancas river and San Bartolome river) would have started during the early Pliocene (Montehermosan Age); 3, the paleoenvironment would have been a fluvial system, with meandering canals interspersed with paleosols developed in floodplains with overflow deposits or abandoned meanders; 4, the paleontological and sedimentary record suggests a well-marked diachronism (from west-southwest to east-northeast) between the beginning of the Neogene sedimentation in the southern sector of San Alberto valley (late Miocene [Huayquerian Age]), the Alpa Corral region (early Pliocene [Monthermosan Age), and Río La Cruz valley (late Pliocene [Chapadmalalan Age]).

Keywords


Early Pliocene; Pleistocene; Paleoenvironmet; Montehermosan; Sierras Pampeanas of Córdoba; Mammals; Argentina

How to cite this article Tauber, A.; Álvarez, F.; Martínez, G.; Haro, A.; Krapovickas, J.; Nieto, G. 2022, New fossiliferous sites and late cenozoic paleoenvironmental evolution of southwestern Córdoba, Argentina.. Andean Geology 49 (1): 94-122. [doi:http://dx.doi.org/10.5027/andgeoV49n1-3316]