The Hercynian Serra in the North which belongs to the Hesperic Massif is essentially composed of shales and greywackes.
The sedimentary infilling of the Guadiana estuary, in the Southern Iberian Peninsula, has been extensively studied using a variety of laboratory methods, namely geochemical and sedimentological analyses, foraminifera assemblages and palynological profiles, supported by 14C dating [1-3](...)
Dissertação de mest., Estudos Marinhos e Costeiros, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2004 ; A análise das variações no conteúdo em espécies de foraminíferos bentónicos ao longo de um testemunho de sondagem recolhido no Estuário do Rio Guadiana e de três testemunhos no Estuário do Rio Arade permitiram identificar cinco paleoambientes com diferentes GIM (Graus de Influência Marinha) ...
The Guadiana River Estuary is located in the terminal part of a deeply incised river valley, which accumulated several tens of meters of sediments during the Holocenic transgression. Five cored boreholes (see Fig.1 for localisation) that reached the pre-Holocenic substratum were drilled recently in order to recognize the architecture of sedimentary facies and to quantify the accumulation of organic carbon trapp...
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