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dc.contributor.author
Alvarez, Bruno Nicolás
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dc.contributor.author
Casal, Gabriel
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dc.contributor.author
Ibiricu, Lucio Manuel
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dc.contributor.author
de Sosa Tomas, Rosaura Andrea
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dc.contributor.author
Suarez, Celina A.
dc.date.available
2023-07-13T11:41:20Z
dc.date.issued
2022-06
dc.identifier.citation
Alvarez, Bruno Nicolás; Casal, Gabriel; Ibiricu, Lucio Manuel; de Sosa Tomas, Rosaura Andrea; Suarez, Celina A.; Insights into paleoecology of the Bajo Barreal Formation (Upper Cretaceous), Patagonia, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 116; 103854; 6-2022; 1-23
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/203641
dc.description.abstract
We present the first integrate paleoecological study which includes both previous and new sedimentological, paleoclimate, fauna and flora analyses in the Bajo Barreal Formation (Upper Cretaceous), Golfo San Jorge Basin, Patagonia, Argentina. The study was carried out principally at the Estancia (=Ranch) Ocho Hermanos Locality, although other significant paleontological localities of the Bajo Barreal Formation are included. In the Estancia Ocho Hermanos Locality, the paleoenvironment is characterized by low sinuosity single-channelized fluvial systems, with well-developed proximal floodplains. Paleoclimate was interpreted as warm and humid with marked seasonality. This locality was dominated by dinosaurs, including sauropods (titanosaurs and rebbachisaurids) and theropods (abelisaurids and megaraptorids), but other vertebrates, such as pterosaurs, crocodyliforms, turtles and fishes were also part of the paleoecosystem. In addition, the first stable isotope analysis on Mesozoic teeth (dinosaurs and crocodyliforms) from the Golfo San Jorge Basin was conducted. This new information revealed different sources of water utilized by theropod and sauropod dinosaurs, allowed to infer preliminary modes of life for crocodyliforms, and provided information about diet of these Mesozoic organisms. Ground-level and mid-height feeding are interpreted for rebbachisaurid and titanosaurid sauropods, respectively. Ferns are considered the main non-arboreal component of this ecosystem and possibly an important source of the diet of sauropods, whereas angiosperms (eudicots and monocots) would have been present as well. On the other hand, gymnosperms, mainly Araucariaceae, and in a minor proportion Podocarpaceae, and Cheirolepidiaceae, would encompass the arboreal component of this environment. Abelisaurids could be recognized as one of the top predators of this paleoecosystem, in part due to their relative abundance, in relation to other carnivores. Finally, in a broad context, this study augments our understanding of Cretaceous terrestrial ecosystems of south-central Patagonia and contributes for future comparisons with other chronologically equivalent localities, principally, from the Southern Hemisphere.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
ECOLOGY
dc.subject
PALEOENVIRONMENT
dc.subject
PALEOCLIMATE
dc.subject
STABLES ISOTOPES
dc.subject
VERTEBRATES
dc.subject
GOLFO SAN JORGE BASIN
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Insights into paleoecology of the Bajo Barreal Formation (Upper Cretaceous), Patagonia, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T19:12:18Z
dc.journal.volume
116
dc.journal.number
103854
dc.journal.pagination
1-23
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Alvarez, Bruno Nicolás. Universidad Nacional de la Patagonia Austral. Centro de Investigaciones y Transferencia Golfo San Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia Golfo San Jorge. Universidad Nacional de la Patagonia "San Juan Bosco". Centro de Investigaciones y Transferencia Golfo San Jorge; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
dc.description.fil
Fil: Casal, Gabriel. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina
dc.description.fil
Fil: Ibiricu, Lucio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina
dc.description.fil
Fil: de Sosa Tomas, Rosaura Andrea. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina
dc.description.fil
Fil: Suarez, Celina A.. University of Arkansas for Medical Sciences; Estados Unidos
dc.journal.title
Journal of South American Earth Sciences
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dc.relation.isreferencedin
info:eu-repo/semantics/reference/doi/https://doi.org/10.1016/j.jsames.2022.103854
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.jsames.2022.103854
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981122001444
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