skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices
Tipo de recurso Mostra resultados com: Mostra resultados com: Índice

Geomorphological and stratigraphic evolution of a fluvial incision in the coastal plain and inner continental shelf in southern Brazil

Barboza, Eduardo G. ; Dillenburg, Sérgio R. ; Lopes, Renato P. ; Rosa, Maria Luiza C.C. ; Caron, Felipe ; Abreu, Vitor ; Manzolli, Rogério P. ; Nunes, José Carlos R. ; Weschenfelder, Jair ; Tomazelli, Luiz J.

Marine geology, 2021-07, Vol.437, p.106514, Article 106514 [Periódico revisado por pares]

Elsevier B.V

Texto completo disponível

Citações Citado por
  • Título:
    Geomorphological and stratigraphic evolution of a fluvial incision in the coastal plain and inner continental shelf in southern Brazil
  • Autor: Barboza, Eduardo G. ; Dillenburg, Sérgio R. ; Lopes, Renato P. ; Rosa, Maria Luiza C.C. ; Caron, Felipe ; Abreu, Vitor ; Manzolli, Rogério P. ; Nunes, José Carlos R. ; Weschenfelder, Jair ; Tomazelli, Luiz J.
  • Assuntos: Holocene/Late-Pleistocene ; Mirim Lagoon ; Paleo-drainage ; Taim swamp
  • É parte de: Marine geology, 2021-07, Vol.437, p.106514, Article 106514
  • Descrição: This paper describes the evolution of a sector of the southern coastal plain of the Pelotas Basin, southern Brazil, between the last Pleistocene sea-level lowstand and the Holocene highstand, based on geomorphology and high-resolution stratigraphy. A fluvial drainage system associated with an incised valley developed during the Last Glacial Maximum (LGM) was identified. Two high-resolution 2D and 2.5D geophysical profiles using Ground-Penetrating Radar (GPR) show a Pleistocene fluvial system's former path, starting close to its present mouth inside Mirim Lagoon crossing the coastal barriers and reaching the inner continental shelf, covering some 60 km across the coastal plain. During the LGM, with the sea-level at −120 to −130 m and the coastline positioned close to the shelf edge (distant 200 km from the present coastline), the fluvial system excavated a ~31.5-m deep channel. Two cores, 36 and 32 m long, show that the paleochannel was filled with sedimentary deposits after 19.4 ka BP, and the facies succession represents the transition from fluvial, to estuarine, to the coastal barrier, and finally to inner shelf depositional environments, generated by processes connected to LGM and the Postglacial Marine Transgression (PMT). The study region behaved as a sediment by-pass zone, connecting the adjacent coastal plain's inner portion with the inner continental shelf. The studied area presents an unusual record of the LGM at a coastal plain domain. [Display omitted] •Records of the Last Glacial Maximum on the coastal plain.•Coastal stratigraphy transition: from basal fluvial to coastal barrier deposits.•Integrating GPR records and Drill Holes data on coastal evolution investigation.•Seismic facies and radarfacies as proxies for coastal evolution.•First record of continuous paleochannel in Southern Brazil.
  • Editor: Elsevier B.V
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.