Early Aptian marine incursions in the interior of northeastern Brazil following the Gondwana breakup

This study reports a set of primeval marine incursions identified in two drill cores, 1PS-06-CE, and 1PS-10-CE, which recovered the Barbalha Formation, Araripe Basin, Brazil. Based on a multi-proxy approach involving stratigraphy, microbiofacies, ichnofossils, and microfossils, three short-lived mar...

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Published in:Scientific reports 2023-04, Vol.13 (1), p.6728-6728, Article 6728
Main Authors: Fauth, Gerson, Kern, Henrique Parisi, Villegas-Martín, Jorge, De Lira Mota, Marcelo Augusto, dos Santos Filho, Marcos Antonio Batista, Santa Catharina, Amanda, Leandro, Lilian Maia, Luft-Souza, Fernanda, Strohschoen, Oscar, Nauter-Alves, Andressa, Tungo, Edna de Jesus Francisco, Bruno, Mauro Daniel Rodrigues, Ceolin, Daiane, Baecker-Fauth, Simone, Bom, Marlone Heliara Hünnig, Lima, Francisco Henrique de Oliveira, Santos, Alessandra, Assine, Mario Luis
Format: Article
Language:English
Subjects:
704/158/2462
704/2151/213/4116
704/2151/414
Animals
Basins
Brazil
Crustacea
Foraminifera
Fossils
Geology
Humanities and Social Sciences
multidisciplinary
Paleontology
Plankton
Science
Science (multidisciplinary)
Stratigraphy
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Summary:This study reports a set of primeval marine incursions identified in two drill cores, 1PS-06-CE, and 1PS-10-CE, which recovered the Barbalha Formation, Araripe Basin, Brazil. Based on a multi-proxy approach involving stratigraphy, microbiofacies, ichnofossils, and microfossils, three short-lived marine incursions were identified, designated Araripe Marine Incursions (AMI) 1–3. AMI-1 and AMI-2, which occur within the shales of the Batateira Beds (lower part of the Barbalha Formation), were identified by the occurrence of benthonic foraminifera, calcareous nannofossils, dinocysts, and a mass mortality event of non-marine ostracods. AMI-3 was recognized in the upper part of the Barbalha Formation, based on the occurrence of ichnofossils and planktonic foraminifera. The observation of the planktonic foraminifera genus Leupoldina for the first time in the basin indicates early Aptian/early late Aptian age for these deposits, and the first opportunity of correlation with global foraminifera biozonation. Our findings have implications for the breakup of the Gondwana Supercontinent, as these incursions represent the earliest marine-derived flooding events in the inland basins of northeastern Brazil.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-32967-w