O registo de diatomáceas e foraminiferos da Ria Formosa (Sul da Península Ibérica): uma contribuição para a compreensão da evolução Holocénica do sistema lagunar.

Gomes, Ana; Pereira, Laura; Boski, T.; Connor, Simon; Mendes da Silva de Sousa, Carlos A; Oliveira, Sónia; Santana, Paulo

http://hdl.handle.net/10400.1/10150

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Authors

Mendes da Silva de Sousa, Carlos A

Oliveira, Sónia

Santana, Paulo

Abstract(s)

As part of a multi-proxy study to reconstruct the Holocene evolution of the Ria Formosa Lagoon, diatom and foraminifera assemblages were analyzed in a ca. 24.6-m-deep borehole, which crossed the entire infill sequence of the local paleovalley. Except in a few samples, diatom assemblages were generally poorly preserved, whereas foraminiferal assemblages were mostly well preserved. In the core depths interval from 23.5 and 3.2 m, both proxies indicate a marine environment installed during the progressive flooding of the fluvial valley during the Holocene. Above 3.2-m, both proxies