Holocene climate pulses and structural controls on the geomorphological estuarine evolution of the Iguape River, Sao Paulo, Brazil

Autor(es)

Souza, A. O. ^{[1, 2]} ; Perez Filho, A. ^[1] ; Lammle, L. ^[1] ; Souza, D. H. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Geosci, Dept Geog, Lab Geomorphol, UNICAMP, BR-13083855 Campinas, SP - Brazil

^[2] Fed Univ Western Bahia UFOB, Ctr Humanities, BR-47808002 Barreiras - Brazil

^[3] Univ Sao Paulo, Inst Energy & Environm, BR-05508010 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONTINENTAL SHELF RESEARCH; v. 205, DEC 10 2020.
• Citações Web of Science: 1

Resumo

The Iguape River estuary - located on the southern coast of Sao Paulo state (Brazil) - presents geomorphological records of the complex processes operating during the Late Holocene. Dating the top deposits of coastal (fluvial, transition and marine deposits) low terraces, contributes to the understanding of the erosive-depositional events resulting from autogenic and allogenic processes. Optically stimulated luminescence (OSL) dating, grain-size and morphostructural analysis were used to investigate the Late Holocene geomorphological evolution of the Iguape estuary. The results suggest that formation of the Iguape estuary is consistent with a marine incursion triggered by climate pulses by around 2.7 ka. However, the coastline displacement was controlled by base-level adjustments and fluvial incision phases probably induced by fault activity associated with the Guapiara Lineament. Finally, the results show that the estuarine systems in humid tropical regions are significantly sensitive to short time-scale climate events during the Holocene. (AU)

• Processo FAPESP: 16/00382-9 - Geocronologia das Coberturas Superficiais em Baixos Terraços Fluviais, Marinhos e Flúvio-Marinhos na Foz das Bacias do Ribeira de Iguape-SP e do Rio Paraíba do Sul-RJ: Flutuações Climáticas Holocênicas no Sudeste Brasileiro
• Beneficiário: André de Oliveira Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/05327-6 - Espacialização e geocronologia das coberturas superficiais em terraços marinhos, fluvio-marinhos e fluviais no contexto das oscilações climáticas, associadas aos episódios de transgressão e regressão marinha holocênicas no litoral brasileiro
• Beneficiário: Archimedes Perez Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular