Tracking Silurian-Devonian events and paleobathymetric curves by ichnologic and taphonomic analyzes in the southwestern Gondwana

Sedorko, Daniel; Netto, Renata Guimarães; Horodyski, Rodrigo Scalise

doi:10.1016/j.gloplacha.2019.05.007

Cited by 27 publications

(11 citation statements)

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“…[24]. The specimens studied are abundant and occur associated with some elements of the Malvinokaffric biota such as brachiopods and trilobites [26,27]. Details regarding its stratigraphic distribution are available in the electronic supplementary material.…”

Section: Resultsmentioning

confidence: 99%

“…These fossils are common in Lower Givetian strata ( post-Kacák event), although they are preserved in Eifelian strata, mostly in sections B and C of Sedorko et al [24]. The specimens studied are abundant and occur associated with some elements of the Malvinokaffric biota such as brachiopods and trilobites [26,27]. Details regarding its stratigraphic distribution are available in the electronic supplementary material.…”

Section: (A) Occurrence Morphology and Ecologymentioning

confidence: 98%

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Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall

et al. 2021

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Biomineralized and organic metazoan tubular skeletons are by far the most common in the fossil record. However, several groups of organisms are also able to agglutinate particles to construct more rigid structures. Here we present a novel type of agglutinated tube from the austral and endemic palaeobiota of the Malvinokaffric realm (Devonian, Brazil). This fossil is characterized by an agglutinated tube made of silt-sized particles forming an unusual flanged morphology that is not known from the fossil record. Besides being able to select specific particles, these organisms probably lived partially buried and were detritus/suspension feeders. Comparisons across different modern groups show that these fossils are strongly similar to tubes made by polychaetes, specifically from the family Maldanidae. If this interpretation is correct, then an early divergence of the Sedentaria clade may have occurred before the Devonian.

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Section: Resultsmentioning

confidence: 99%

Section: (A) Occurrence Morphology and Ecologymentioning

confidence: 98%

Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall

et al. 2021

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“…Pouco se discute na literatura acerca deste constante aporte de areia durante a deposição da Formação Ponta Grossa, que pode estar associado tanto ao soerguimento de áreas adjacentes, possivelmente associado a Orogenia Precordilheirana que se desenvolveu entre o Praguiano e o Emsiano no limite sul-ocidental do Gondwana (Milani & Ramos, 1998;Sedorko et al, 2019), quanto por mudanças nas condições climáticas, favorecendo a formação de fluxos hiperpicnais (Mulder et al, 2003).…”

Section: Quadrado Médiounclassified

Uso de espectrometria de raios-gama aplicado à caracterização de sucessões argilosas: estudo de caso em um intervalo devoniano da borda leste da Bacia do Paraná, Brasil

et al. 2021

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Dados diretos de subsuperfície são ainda escassos na borda leste da Bacia do Paraná e perfis de poços são rotineiramente utilizados para interpretação litológica. Com base nisto, propõe-se um estudo integrado que objetiva a caracterização litológica e gamaespectométrica do testemunho do poço 2-TB-1-PR (Tibagi), amostrado continuamente da superfície (0,00 m) até 451,60 m de profundidade, além de reconhecer, em subsuperfície, as unidades siluro-devonianas que afloram na área de estudo. As características litológicas permitiram distinguir cinco intervalos (A-E), no Intervalo A (438,80-451,60 m) observa-se arenitos com estratificação cruzada atribuídos à Formação Furnas; o Intervalo B (432,60-438,80 m) é constituído por arenitos laminados intercalados com argilitos, que apresentam elevadas médias de Th, K e GR e é correlato as “camadas de transição” presentes entre as formações Furnas e Ponta Grossa. Nos intervalos C (208,10-432,60 m) e D (13,00-208,10 m) predominam argilitos laminados típicos da Formação Ponta Grossa, com idades entre o Neopraguiano e o Eo/MesoGivetiano(?). Intercalações entre argilitos e arenitos estão presentes, bem como arenitos, que, por vezes, exibem laminações cruzadas por onda. No intervalo D as camadas de arenito ocorrem com maior frequência e espessura e no C as rochas apresentam médias de Th, U, K e GR inferiores às do testemunho. O Intervalo E (13,00-0,00 m), constituído por rochas mosqueadas e com valores elevados de Th, U e K é correlato ao Grupo Itararé (Permo-carbonífero). A pequena dispersão dos valores de Th, U, K e GR não permitiu a elaboração de um modelo de predição litológica para sucessões argilosas, mas salienta a existência de padrões atribuídos ao paleoambiente deposicional.

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“…These supersequences were generated in response to tectonic-eustatic cycles associated with the evolution of the Western Gondwana, deposited from Late Ordovician to Late Cretaceous in several depositional settings mostly controlled by eustatic and subsidence cycles during Silurian to Devonian (see Assine, 1996;Bergamaschi, 1999;Cândido & Rostirola, 2007;Sedorko, Netto & Savrda, 2018b;Vargas et al, 2020, for a stratigraphic framework of Paraná Supersequence). Trace fossils are well-distributed along the whole Paraná Supersequence (Sedorko, Netto & Horodyski, 2019), but Zoophycos is only preserved in Pragian to Eifelian strata (Sedorko, Netto & Horodyski, 2018c). Regarding lithostratigraphy, this cycle is composed of Furnas and Ponta Grossa formations (sensu Lange & Petri, 1967; other lithostratigraphic nomenclature is proposed in Grahn, Mendelowicz Mauller, Bergamaschi & Bosetti, 2013).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Furnas Formation presents expressions of proximal Cruziana and Skolithos ichnofacies (Sedorko et al, 2017). The Ponta Grossa Formation is traditionally divided into Jaguariaíva, Tibagi, and São Domingos members (Lange & Petri, 1967) and presents the dominance of archetypal to distal expressions of Cruziana ichnofacies (Sedorko et al, 2019). The Zoophycos distribution in Ponta Grossa Formation was discussed in Sedorko, Netto & Horodyski (2018c, 2019.…”

Section: Geological Settingmentioning

confidence: 99%

Ichnological Research of Silurian–Devonian Strata and the Zoophycos Distribution in the Paraná Basin

2021

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The Silurian–Devonian strata of the Paraná Basin (southern Brazil) have a wide variety of ichnofossils. The first records date from the beginning of the last century, with pioneering studies in 1912 addressing the Furnas and Ponta Grossa formations. Significant advances in the ichnological knowledge of these units occurred between the 1980s and 1990s, emphasizing ichnotaxonomic characterizations. These ichnological studies were important for better understanding and describing the main depositional environments, ecological strategies, biostratigraphy, and the relation with the preserved paleofauna. In this contribution, we review this knowledge and analyze the distribution and paleoecological significance of Zoophycos, the most remarkable ichnotaxon in the Lower Paleozoic beds of the Paraná Basin.

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Tracking Silurian-Devonian events and paleobathymetric curves by ichnologic and taphonomic analyzes in the southwestern Gondwana

Cited by 27 publications

References 46 publications

Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall

Devonian agglutinated polychaete tubes: all in all it's just another grain in the wall

Uso de espectrometria de raios-gama aplicado à caracterização de sucessões argilosas: estudo de caso em um intervalo devoniano da borda leste da Bacia do Paraná, Brasil

Ichnological Research of Silurian–Devonian Strata and the Zoophycos Distribution in the Paraná Basin

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