Resumen de O registo de diatomáceas e foraminiferos da Ria Formosa (SuL da Península Ibérica): uma contribuição para a compreensão da evolução Holocénica do sistema lagunar
Sofía Gomes, Laura Pereira, T. Boski, Delminda Moura, Simon Connor, Carlos Sousa Mendes, S. Oliveira, P. Santana
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 converge, indicating a mid-intertidal environment, increasingly confined during the enclosing of the lagoonal system.
