Dinos among the dunes: Dinoturbation in the Pirambóia Formation (Paraná Basin), São Paulo State and comments on cross-section tracks

Autor: Marcelo Adorna Fernandes, José Alexandre de Jesus Perinotto, L. Inglez, Lucas Veríssimo Warren, Marcello Guimarães Simões, Mario Luis Assine, Luciano Alessandretti, Beatriz Christofoletti, Bernardo de C. P. e M. Peixoto
Přispěvatelé: Universidade Estadual Paulista (Unesp), Universidade Federal de São Carlos (UFSCar), Universidade Federal de Uberlândia (UFU)
Rok vydání: 2021
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 0895-9811
DOI: 10.1016/j.jsames.2021.103252
Popis: Made available in DSpace on 2021-06-25T10:55:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-08-01 Agência Nacional do Petróleo, Gás Natural e Biocombustíveis Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Soft-sediment deformation structures are conspicuous features found in both ancient and modern, shallowly buried, loose, and water-saturated sediments related to diverse depositional environments. Numerous triggering mechanisms can induce their development, including seismicity, glaciotectonics, overload, and bioturbation. The presence of soft-sediment deformation in the Jurassic fluvial-eolian Pirambóia Formation has been known for a long time and was usually associated with seismic-induced triggers. Recently described synsedimentary structures in wet interdune deposits from the lower part of this unit, close to its type area in São Paulo State, southeastern Brazil, are now interpreted as true cross-section tracks produced by large tetrapods based on examples from the literature and morphological analyzes. Based on their age, size, and comparisons with dinosaur tracks described in Jurassic lithostratigraphic units from Paraná Basin in Brazil (Guará Formation) and Waterberg Basin (Etjo Formation), we suggest here, for the first time, that some of those deformational structures were produced by dinosaurs. Furthermore, the cross-section tracks from the Pirambóia Formation in São Paulo State exceed in size the tracks with therapsid affinity described in the Permian-Triassic unit in southern Brazil, hindering their full correlation. This finding may potentially represent the oldest evidence of the presence of dinosaurs in the São Paulo State territory, expanding our knowledge of the poorly known Jurassic tetrapod fauna of Brazil. Additionally, these cross-section tracks reinforce the possible correlation, at least in part, of the Pirambóia Formation in its northern occurrence (near to its type area) with the Jurassic Guará Formation from southern Brazil. Departamento de Geologia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista-UNESP, Avenida 24-A, 1515 Bela Vista, Cx. P. 178 Laboratório de Paleoecologia e Paleoicnologia Departamento de Ecologia e Biologia Evolutiva Universidade Federal de São Carlos - UFSCar Instituto de Geografia Universidade Federal de Uberlândia, Rodovia LMG-746 Km 01 Setor de Zoologia Instituto de Biociências Universidade Estadual Paulista-UNESP, Distrito de Rubião Junior, s/n, 510 Departamento de Geologia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista-UNESP, Avenida 24-A, 1515 Bela Vista, Cx. P. 178 Setor de Zoologia Instituto de Biociências Universidade Estadual Paulista-UNESP, Distrito de Rubião Junior, s/n, 510 CNPq: 141220/2018–0
Databáze: OpenAIRE
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