Tafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR)

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorNeves, Jacqueline Peixoto-
Autor(es): dc.creatorRohn, Rosemarie-
Autor(es): dc.creatorSimões, Marcello Guimarães-
Data de aceite: dc.date.accessioned2025-08-21T23:32:29Z-
Data de disponibilização: dc.date.available2025-08-21T23:32:29Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2010-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.5327/Z1519-874X2010000300002-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226105-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226105-
Descrição: dc.descriptionHerein, it is presented the first detailed taphonomic study on bivalve mollusk shells preserved in the oolitic limestones of the Teresina Formation (probably Kungurian-Roadian, Lower-Middle Permian) in the eastern margin of the Paraná basin. The selected beds are located in two quarries (informally named PRU 1 and PRU 2) in Prudentópolis municipality (Center-South Paraná State), and positioned approximately in the middle of the formation and probably in the Pinzonella illusa Zone. The PRU 1 limestone (∼30 cm thick), which is partially silicified and intercalated with predominantly pelitic rocks, is classified as a bivalve oolitic grainstone. The basal contact is erosive and the top shows symmetrical ripple marks, which are draped by shale with mud cracks. There are two fining-upwards successions characterized by dense to dispersed packing of the shells, which are usually disarticulated, randomly oriented (many nested/stacked) and mixed with some pelitic intraclasts. Microhummocky cross-stratification occurs a little below the top of the bed. The PRU2 bed is classified as ooidbivalve rudstone (∼5 cm thick), where all shells are disarticulated and fragmented, showing dense packing. The bivalves probably inhabited a muddy substrate and were mixed (as parautochtonous and allochthonous bioclasts) with ooids during high-energy storm events, including posterior shell displacement as a result of bioturbation. Thus, the calcareous beds represent amalgamated proximal tempestites with a complex taphonomic history, strong temporal/spatial mixing of bioclasts and limited paleoecological resolution. They are a typical example of shell beds generated in a huge epeiric sea, which was not necessarily connected to the ocean and where very low depositional-slope gradient, very slow subsidence and minimum sediment accommodation space caused frequent sediment reworking by storm related processes.-
Descrição: dc.descriptionDepartamento de Zoologia Instituto de Biociências UNESP, Distrito de Rubião Júnior s/n, CEP 18618-000, Botucatu, SP-
Descrição: dc.descriptionDepto. de Geologia Aplicada Instituto de Geociências e Ciências Exatas UNESP, Rio Claro, SP, BR-
Descrição: dc.descriptionDepartamento de Zoologia Instituto de Biociências UNESP, Distrito de Rubião Júnior s/n, CEP 18618-000, Botucatu, SP-
Descrição: dc.descriptionDepto. de Geologia Aplicada Instituto de Geociências e Ciências Exatas UNESP, Rio Claro, SP, BR-
Formato: dc.format19-36-
Idioma: dc.languagept_BR-
Relação: dc.relationGeologia USP - Serie Cientifica-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectLimestone-
Palavras-chave: dc.subjectParaná Basin-
Palavras-chave: dc.subjectPermian-
Palavras-chave: dc.subjectTaphonomy-
Palavras-chave: dc.subjectTeresina Formation-
Título: dc.titleTafonomia de biválvios em calcários oolíticos da formação Teresina (Bacia do Paraná, permiano médio, prudentópolis, PR)-
Título: dc.titleTaphonomy of bivalve mollusks in oolitic limestones from Teresina Formation (Paraná Basin, Middle Permian, prudentópolis, PR)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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