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Artículo

The uppermost Cretaceous continental deposits at the southern end of Patagonia, the Chorrillo Formation case study (Austral-Magallanes Basin): Sedimentology, fossil content and regional implications

Moyano Paz, DamiánIcon ; Rozadilla, SebastianIcon ; Agnolin, FedericoIcon ; Vera, Ezequiel IgnacioIcon ; Coronel, Marina DeniseIcon ; Varela, Augusto NicolásIcon ; Gómez Dacal, Alejandro RubénIcon ; Aranciaga Rolando, Alexis MauroIcon ; D'angelo, Julia SoledadIcon ; Perez Loinaze, Valeria SusanaIcon ; Richiano, Sebastián MiguelIcon ; Chimento, Nicolás RobertoIcon ; Motta, Matias JavierIcon ; Sterli, JulianaIcon ; Manabe, M.; Tsuihiji, T.; Isasi, Marcelo PabloIcon ; Poire, Daniel GustavoIcon ; Novas, Fernando EmilioIcon
Fecha de publicación: 02/2022
Editorial: Academic Press Ltd - Elsevier Science Ltd
Revista: Cretaceous Research
ISSN: 0195-6671
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Geología

Resumen

The deposits of the Chorrillo Formation (Maastrichtian) were accumulated during a ‘continental window’ that occurred during the Late Cretaceous in the Austral-Magallanes foreland basin, southern Patagonia, Argentina. The aim of the present contribution is to describe the depositional conditions as well as new vertebrate and plant fossils from this unit. The analysis of these deposits resulted in the definition of five architectural elements: Complex sandy narrow sheets channels (SS), Complex gravelly narrow sheets channels (GS), Sandstone lobes (SL), Thick fine-grained deposits (GF) and Thin dark fine-grained deposits (DF). These were separated into channelized and non-channelized units and represent the accumulation in a fine-grained dominated, fossil rich fluvial depositional system. Vertebrates fossil records include two species of frogs of the genus Calypteocephalella (representing the southernmost record of Pipoidea), snakes belonging to Madtsoiidae and Anilioidea (the latter ones being the first records for the basin), chelid turtles similar to Yaminuechelys-Hydromedusa, meiolaniiform turtles, titanosaur sauropods, megaraptoran theropods, new remains of the elasmarian Isasicursor santacrucensis (including the first cranial remains available for this species), hadrosaur ornithischians, enantiornithine birds. Sharks and elasmosaurs are also recorded and may possibly derive from the overlying marine Calafate Formation. These new taxa, together with previous findings from the Chorrillo Formation, are included into a stratigraphic column, thus providing valuable information that sheds new light on faunistic composition and paleobiogeography of high-latitude biotas of Gondwana.
Palabras clave: CONTINENTALIZATION , FLUVIAL SYSTEM , FORELAND BASIN , FOSSIL VERTEBRATES , MAASTRICHTIAN , PALEOBOTANY
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/187149
DOI: http://dx.doi.org/10.1016/j.cretres.2021.105059
Colecciones
Articulos(CIG)
Articulos de CENTRO DE INVEST.GEOLOGICAS (I)
Articulos(IPGP)
Articulos de INSTITUTO PATAGONICO DE GEOLOGIA Y PALEONTOLOGIA
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Moyano Paz, Damián; Rozadilla, Sebastian; Agnolin, Federico; Vera, Ezequiel Ignacio; Coronel, Marina Denise; et al.; The uppermost Cretaceous continental deposits at the southern end of Patagonia, the Chorrillo Formation case study (Austral-Magallanes Basin): Sedimentology, fossil content and regional implications; Academic Press Ltd - Elsevier Science Ltd; Cretaceous Research; 130; 2-2022; 1-30
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