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Advisor(s)
Abstract(s)
Na região do Algarve, a sedimentação pós Miocénico foi quase exclusivamente detrítica e a escassez de horizontes cronológicos torna muito difícil posicionar a fronteira Neogénico-Quaternário (FNQ). Com base na magnetostratigrafia e na interpretação das fácies sedimentares, propõe-se no presente trabalho que seja considerada como FNQ a inversão de polaridade Gauss-Matuyama, uma vez que ocorre no seio de um sistema regressivo que poderá corresponder à instalação de condições de glacial no Hemisfério Norte.
The Algarve’s post Neogene sedimentation was mainly clastic and the lack of precise chronological data makes it really hard to establish the Neogene - Quaternary boundary (NQB). We are proposing in this work to match the NQB with the Gauss-Matuyama polarity inversion. According to the magnetostratigraphic and facies interpretation data, that inversion occurred when sea level was falling, probably due to major glaciation’s onset in the Northern hemisphere.
The Algarve’s post Neogene sedimentation was mainly clastic and the lack of precise chronological data makes it really hard to establish the Neogene - Quaternary boundary (NQB). We are proposing in this work to match the NQB with the Gauss-Matuyama polarity inversion. According to the magnetostratigraphic and facies interpretation data, that inversion occurred when sea level was falling, probably due to major glaciation’s onset in the Northern hemisphere.
Description
Keywords
Pliocénico Plistocénico Fácies sedimentares Geopolaridade
Citation
Publisher
CIMA – Centro de Investigação Marinha e Ambiental, Universidade do Algarve