Not all shell beds are made equal: Recognizing singular event-concentrations in megalakes

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorEscola de Minas-
Autor(es): dc.contributorFriedrich-Alexander-Universität Erlangen-Nürnberg-
Autor(es): dc.contributorUniversidade Federal de Uberlândia (UFU)-
Autor(es): dc.contributorUniversidade de Brasília (UnB)-
Autor(es): dc.creatorRodrigues, Mariza Gomes-
Autor(es): dc.creatorGiovanini Varejão, Filipe-
Autor(es): dc.creatorFürsich, Franz Theodor-
Autor(es): dc.creatorChristofoletti, Beatriz-
Autor(es): dc.creatorMatos, Suzana Aparecida-
Autor(es): dc.creatorWarren, Lucas Veríssimo-
Autor(es): dc.creatorInglez, Lucas-
Autor(es): dc.creatorCerri, Rodrigo Irineu-
Autor(es): dc.creatorAssine, Mario Luis-
Autor(es): dc.creatorSimões, Marcello Guimarães-
Data de aceite: dc.date.accessioned2025-08-21T18:25:13Z-
Data de disponibilização: dc.date.available2025-08-21T18:25:13Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1111/sed.13221-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299461-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299461-
Descrição: dc.descriptionEvent deposition accounts for a large part of the preserved sedimentary record. Tempestites, tsunamites and turbidites are among the most common event deposits in marine and lacustrine systems. While facies models exist for these deposits, the challenge lies in the fact that diverse triggers can give rise to analogous depositional processes and comparable taphonomic features, making it difficult to pinpoint the precise trigger for an event bed. Hence, five distinct modern-type shell concentrations are studied in Permian strata from the Paraná Basin, West Gondwana, to access the parameters to discriminate event phenomena, and their associated depositional and taphonomic processes. During this time interval, the basin underwent continuous continentalization due to orogenic events, leading to the entrapment of epeiric marine waters and the transformation of the system into a megalake, supporting a diverse and endemic freshwater bivalve fauna. While sedimentation was primarily influenced by meteorological events, certain stratigraphic intervals were also affected by tectonically active periods and meteor impact events. The different products are categorized into bioclastic sandstone, shell bed, shell-rich phosclast rudstone and shell-rich conglomerate that are interpreted as proximal and distal tempestites and tsunamites, respectively. Finally, the products and the processes that lead to the deposition of tempestites and tsunamites are compared to establish diagnostic signatures that may be applied to differentiate these event concentrations in analogous settings from the geological record.-
Descrição: dc.descriptionDepartamento de Geologia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Avenida 24A, 1515-
Descrição: dc.descriptionSetor de Zoologia Instituto de Biociências Universidade Estadual Paulista, Distrito de Rubião Júnior-
Descrição: dc.descriptionDepartamento de Geologia Universidade Federal de Ouro Preto Escola de Minas, MG-
Descrição: dc.descriptionGeoZentrum Nordbayern FG Paläoumwelt Friedrich-Alexander-Universität Erlangen-Nürnberg, Loewenichstr 28-
Descrição: dc.descriptionInstituto de Geografia Universidade Federal de Uberlândia Rua XV de Novembro Boa Vista, 501 LAPE, MG-
Descrição: dc.descriptionInstituto de Geociências Universidade de Brasília, Campus Universitário Darcy Ribeiro ICC - Ala Central, DF-
Descrição: dc.descriptionDepartamento de Geologia Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Avenida 24A, 1515-
Descrição: dc.descriptionSetor de Zoologia Instituto de Biociências Universidade Estadual Paulista, Distrito de Rubião Júnior-
Formato: dc.format2404-2447-
Idioma: dc.languageen-
Relação: dc.relationSedimentology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectHigh-energy events-
Palavras-chave: dc.subjectmegalakes-
Palavras-chave: dc.subjectshell beds-
Palavras-chave: dc.subjecttempestites-
Palavras-chave: dc.subjecttsunamites-
Título: dc.titleNot all shell beds are made equal: Recognizing singular event-concentrations in megalakes-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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