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

• Ana Gomes ^[1] ; Laura Pereira ^[1] ; Tomasz Boski ^[1] ; D. Moura ^[1] ; Simon Connor ^[2] ; Carlos Sousa ^[1] ; S. Oliveira ^[1] ; P. Santana ^[1]
  1. [1] Universidade do Algarve

     Universidade do Algarve

     Faro (Sé), Portugal

     
  2. [2] Monash University

     Monash University

     Australia

     
• Localización: El Cuaternario Ibérico. Investigación en el s. XXI: VIII Reunión de Cuaternario Ibérico (Sevilla - La Rinconada 2013) / coord. por Rafael Baena Escudero, José Juan Fernández Caro, Inmaculada Guerrero Amador, 2013, ISBN 978-84-695-8601-3, págs. 259-262
• Idioma: portugués
• Títulos paralelos:
  • A diatom and foraminifera record from the Ria Formosa Lagoon (SW Iberian Peninsula): its contribution to understanding the Lagoon’s Holocene evolution
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• Resumen

  • 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.