Phytoliths indicate environmental changes correlated with facies analysis in a paleo island-lake, Upper Paraná River, Brazil

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorState University of Maringá-
Autor(es): dc.contributorFederal University of Mato Grosso do Sul-
Autor(es): dc.contributorState University of Paraná-
Autor(es): dc.contributorState University of Western Paraná-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorRasbold, Giliane Gessica-
Autor(es): dc.creatorStevaux, José Cândido-
Autor(es): dc.creatorParolin, Mauro-
Autor(es): dc.creatorLeli, Isabel Teresinha-
Autor(es): dc.creatorLuz, Leandro Domingos-
Autor(es): dc.creatorBrito, Hermes Dias [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:24:43Z-
Data de disponibilização: dc.date.available2022-02-22T00:24:43Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jsames.2020.102513-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/198499-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/198499-
Descrição: dc.descriptionPhytolith analysis has become a useful tool for paleoenvironmental studies. Phytoliths are produced by plants and are composed of biogenic silica, giving them higher resistance to diagenetic and oxidation processes that commonly occur in tropical sediments. Here, we analyzed the preserved phytolith assemblages in a sedimentary core recovered from an island in the Upper Paraná River. Deposition and preservation of distinctive phytoliths of different vegetation types in the sedimentary facies have provided evidence of the formation of the fluvial island and the floral succession since the Late Pleistocene. Three distinctive phases were described in the island formation. The sandy base (Sr facies) of the core (240 cm) was dated to 14,620 cal yr BP. Most phytoliths in this phase were characteristic of the Podostemaceae family -- aquatic plants adapted to intense water flow. At 97 cm depth, organic sedimentary facies (Fm facies) were dated to 7382 cal yr BP. At this phase, the phytolith assemblage is composed mainly of parallelepipedal bulliform, cuneiform bulliform, and elongate psilate; such morphotypes are primarily produced by grasses. Towards the core top is a layer of massive fine sediments (Vm facies) with greater abundance of plant fragments. The assemblage is composed of short cells, predominantly the bilobate morphotype, which is characteristic of the Panicoideae subfamily (Poaceae) and indicative of soil humidity.-
Descrição: dc.descriptionPostgraduate Program in Ecology of Inland Waters State University of Maringá-
Descrição: dc.descriptionPostgraduate Program in Geography Federal University of Mato Grosso do Sul-
Descrição: dc.descriptionLaboratory of Paleoenvironmental Studies State University of Paraná-
Descrição: dc.descriptionPostgraduate Program in Geography State University of Western Paraná, Marechal Cândido Rondon-
Descrição: dc.descriptionGrupo de Estudos Multidisciplinares do Ambiente (GEMA) State University of Maringá-
Descrição: dc.descriptionLaboratory of the Geoscience Applied Center UNESPetro Geoscience and Exact Science Institute (IGCE) São Paulo State University (UNESP)-
Descrição: dc.descriptionLaboratory of the Geoscience Applied Center UNESPetro Geoscience and Exact Science Institute (IGCE) São Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationJournal of South American Earth Sciences-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAnabranching channel-
Palavras-chave: dc.subjectFacies analysis-
Palavras-chave: dc.subjectFluvial environment-
Palavras-chave: dc.subjectPhytoliths-
Palavras-chave: dc.subjectQuaternary-
Título: dc.titlePhytoliths indicate environmental changes correlated with facies analysis in a paleo island-lake, Upper Paraná River, Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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