Sea-level fall and coastal water cooling during the Late Holocene in Southeastern Brazil based on vermetid bioconstructions

Autor(es)

Toniolo, Thiago de Freitas ^[1] ; Fonseca Giannini, Paulo Cesar ^[1] ; Angulo, Rodolfo Jose ^[2] ; de Souza, Maria Cristina ^[2] ; Ruiz Pessenda, Luiz Carlos ^[3] ; Spotorno-Oliveira, Paula ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Geociencias, Sao Paulo - Brazil

^[2] Univ Fed Parana, Dept Geol, Curitiba, Parana - Brazil

^[3] Univ Sao Paulo, Ctr Energia Nucl Agr, Sao Paulo - Brazil

^[4] Univ Fed Rio Grande, Inst Oceanog, Programa Posgrad Oceanol, Rio Grande, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MARINE GEOLOGY; v. 428, OCT 2020.
• Citações Web of Science: 0

Resumo

The relative sea-level variation curve, obtained by dating and leveling vermetid shells from northern Santa Catarina State (26.3 degrees S), presents fall trend during all the last 4.0 cal ka BP, which matches previous results based on the same kind of indicator for the Brazilian coast between 3 degrees S and 28 degrees S. Chemical and isotopic analyses of 50 vermetid bioconstructions from distinct localities of south-southeastern Brazilian coast indicate possible changes in the coastal water temperature. These changes may have been caused by oscillations in the strength of Brazilian Coastal Current, which carries La Plata Plume northward, being therefore responsible for the penetration of cold and less saline water masses in the study area. This is a reasonable explanation for the scarcity of vermetid biolithites around 3.4-2.6 cal ka BP and 0.5-0 cal ka BP. (AU)

• Processo FAPESP: 09/54232-4 - Morfodinâmica e cronologia de sistemas deposicionais eólicos no Quaternário do Brasil
• Beneficiário: Paulo César Fonseca Giannini
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/21941-8 - Uso de vermetídeos fósseis de São Francisco do Sul (SC) como indicadores de variação do nível relativo do mar e para a discussão da circulação costeira no Holoceno
• Beneficiário: Thiago de Freitas Toniolo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica