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Late Pleistocene and Holocene environmental changes in the coastal zone of northwestern Portugal

2006; Wiley; Volume: 21; Issue: 8 Linguagem: Inglês

10.1002/jqs.1009

1099-1417

G. Soares de Carvalho, Helena Granja, E. Loureiro, Renato Henriques,

Geological formations and processes

Abstract This paper examines the Quaternary changes in the coastal zone of northwestern Portugal through the relationship between sediments and landforms. By interpolating the available data from geomorphology, lithostratigraphy, sedimentology and geochronology, it was possible to reconstruct existing palaeoenvironments, the oldest of which date back to the last interglacial. The main landforms are a high and a low platform bounded by scarps. River sands and silty sediments formed in a lacustrine environment (Antas Formation, MIS 5) are associated with the high platform. Two deposits are associated with the low platform: the Cepães Formation (MIS 3) consisting of a lower set of river sand beds and an upper gravel beach bed, and the Aguçadoura Formation (MIS 1) consisting of Holocene lagoonal beds. Copyright © 2006 John Wiley & Sons, Ltd.