Upper Aptian–lower Albian of the southern-central Araripe Basin, Brazil: Microbiostratigraphic and paleoecological inferences

Araripe, Rilda Verônica Cardoso de; Lemos, Flávia Azevedo Pedrosa; Prado, Ludmila Alves Cadeira do; Tomé, Maria Emília Travassos Rios; Oliveira, David Holanda de; Pereira, Priscilla Albuquerque; Nascimento, Luiz Ricardo S.L.; Asakura, Yumi; Ng, Christiano; Viviers, Marta Cláudia; Barreto, Alcina Magnólia Franca

doi:10.1016/j.jsames.2022.103814

Cited by 26 publications

(18 citation statements)

References 70 publications

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“…Well‐preserved and diverse micro‐ and macrofossils are conspicuous evidence of a major marine incursion into the interior of northeastern Brazil from late Aptian to early Albian (Arai & Assine, 2020; Araripe et al., 2022; Fürsich et al., 2019; Melo et al., 2020). The marine shales contain two noteworthy fossil‐rich intervals: a lower interval with fossil‐rich carbonate concretions (Martill, 1988), and upper beds with echinoid‐bearing shelly limestones (Custódio et al., 2017; Fürsich et al., 2019; Rodrigues et al., 2022).…”

Section: Geological Settingmentioning

confidence: 99%

“…These concretions are mostly recognized by presenting fossils of vertebrates, such as fishes, pterosaurs, turtles (e.g., Kellner & de Almeida Campos, 1999; Vila Nova et al., 2011), among many other exceptionally preserved specimens (Konservat‐Lagerstätte) (Maisey, 1991; Martill, 1990). Additionally, concretions, and the surrounding sediments, preserved a variety of macro‐ and microfossils, such as non‐marine (Araripe et al., 2022; Bom et al., 2021; Melo et al., 2020) and marine (Araripe et al., 2022; Guzmán et al., 2023; Tomé et al., 2022) ostracods, continental palynomorphs (Arai & Assine, 2020; Heimhofer et al., 2007, 2008b), organic‐walled dinocysts (Arai & Assine, 2020), calcareous nannofossils (Araripe et al., 2022), benthic and planktic foraminifera (Araripe et al., 2022; Bom et al., 2021; Melo et al., 2020), bivalves (Fürsich et al., 2019; Rodrigues et al., 2022), gastropods (Fürsich et al., 2019), and crustaceans (Fürsich et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

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Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

Bom,

Kochhann,

Heimhofer

et al. 2023

Paleoceanog and Paleoclimatol

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Fossils from the Araripe Basin (northeastern Brazil) are known for their remarkable preservation of vertebrates and invertebrates, even including soft tissues. They occur in carbonate concretions within organic carbon‐rich strata assigned to the Romualdo Formation. Here we present integrated stable isotope, elemental and microfossil records from the Sítio Sobradinho outcrop, Araripe Basin, northeastern Brazil. Our results imply that black shales hosting fossil‐bearing carbonate concretions within the lower Romualdo Formation were deposited during Oceanic Anoxic Event (OAE) 1b (Kilian sub‐event). Our high‐resolution multi‐proxy approach allows identifying four phases of environmental evolution. After a pre‐event phase, an early phase (onset of the negative carbon isotope excursion—nCIE) of water column stratification and reduced oxygenation likely preconditioned the system for organic carbon burial and preservation. A second phase (peak nCIE) was characterized by an intensified hydrological cycle and continental runoff, as well as increased influx of terrestrial organic matter. High input of continent‐derived nutrients might have enhanced biological productivity in the epicontinental sea, ultimately leading to increased organic carbon fluxes and burial, as well as carbonate dissolution at the seafloor. All together, these paleoenvironmental conditions resulted in expansion of an oxygen minimum zone (OMZ), favoring taphonomic processes that led to the excellent preservation of diverse macro‐ and microfossils. The nCIE recovery phase was characterized by reduced nutrient supply and organic carbon burial. Organic carbon sequestration in such paleoenvironments likely contributed to the recovery (increase) of stable carbon isotope (δ13C) records in the deep ocean during the Kilian sub‐event of OAE 1b.

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Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

Bom,

Kochhann,

Heimhofer

et al. 2023

Paleoceanog and Paleoclimatol

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“…Its deposits of black shales with fossil-bearing carbonate concretions (e.g. 16 , 31 ) are famous for their well-preserved fossils, and include continental (palynomorphs and ostracods 15 ) and marine groups (dinoflagellates 18 , benthonic and planktonic foraminifera 19 , 20 , marine ostracods 20 , and calcareous nannofossils 20 ). The distribution of these marine organisms, many related to the Tethyan Realm, suggests short marine incursions from the Central Atlantic Ocean (e.g.…”

Section: Geological Settingmentioning

confidence: 99%

“…The distribution of these marine organisms, many related to the Tethyan Realm, suggests short marine incursions from the Central Atlantic Ocean (e.g. 7 , 20 , 32 , 33 ), which could have occurred due to sufficient tectonic subsidence rates, accompanied by sea level rise episodes 9 , 34 at different times during the Early Cretaceous.…”

Section: Geological Settingmentioning

confidence: 99%

“…The origin of this large interior basin is related to the breakup of the Gondwana 11 – 14 , and late Aptian–early Albian marine incursions have already been identified (e.g. 7 , 8 , 15 – 20 ). Our work yielded new ichnological, micropaleontological, and microbiofaciological data for the Barbalha Formation, the lowermost stratigraphic unit of the post-rift sequence of the basin and allowed identification of the primeval marine incursions in northeastern Brazil.…”

Section: Introductionmentioning

confidence: 95%

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

Fauth

Kern

Villegas‐Martín

et al. 2023

Sci Rep

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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.

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Dinosaur Footprints Throughout Mesozoic Basins in Brazil

Carvalho

2024

Dinosaur Tracks of Mesozoic Basins in Brazil

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Upper Aptian–lower Albian of the southern-central Araripe Basin, Brazil: Microbiostratigraphic and paleoecological inferences

Cited by 26 publications

References 70 publications

Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

Fossil‐Bearing Concretions of the Araripe Basin Accumulated During Oceanic Anoxic Event 1b

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

Dinosaur Footprints Throughout Mesozoic Basins in Brazil

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