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Upper Pleistocene to Holocene peatland evolution in Southern Brazilian highlands as depicted by radar stratigraphy, sedimentology and palynology

de Oliveira, Marcelo Accioly Teixeira ; Porsani, Jorge Luis ; de Lima, Gisele Leite ; Jeske-Pieruschka, Vivian ; Behling, Hermann

Quaternary research, 2012-05, Vol.77 (3), p.397-407 [Periódico revisado por pares]

New York, USA: Cambridge University Press

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  • Título:
    Upper Pleistocene to Holocene peatland evolution in Southern Brazilian highlands as depicted by radar stratigraphy, sedimentology and palynology
  • Autor: de Oliveira, Marcelo Accioly Teixeira ; Porsani, Jorge Luis ; de Lima, Gisele Leite ; Jeske-Pieruschka, Vivian ; Behling, Hermann
  • Assuntos: Brazil ; Clastic inputs ; Evolutionary ; Geochronology ; GPR ; Highlands ; Original Articles ; Palynology ; Peatlands ; Pollen ; Proxy client servers ; Quaternary ; Radar ; Radar stratigraphy
  • É parte de: Quaternary research, 2012-05, Vol.77 (3), p.397-407
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
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  • Descrição: Paleoenvironmental interpretation of proxy data derived from peatlands is largely based upon an evolutionary model for ombrotrophic bogs, in which peat accumulates in still environments. Reports on proxies obtained from minerotrophic fens, where hydrologic inputs are variable, are less common. In this study, a highland peatland in southern Brazil is presented through ground penetrating radar (GPR) and sedimentological, palynological and geochronologic data. The radar stratigraphic interpretation suggests a relatively complex history of erosion and deposition at the site since the beginning of Marine Isotope Stage 3 (MIS 3) interstadial period. In spite of this, radar stratigraphic and palynologic interpretations converge. Electromagnetic reflections tend to group in clusters that show lateral coherence and correlate with different sediment types, while pollen grains abound and are well preserved. As a result, the study of minerotrophic fens provides a source of proxies, suggesting that ombrotrophic bogs are not the only reliable source of data in wetlands for palynological analysis.
  • Editor: New York, USA: Cambridge University Press
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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