Browsing by Author "Rodrigues, A. L."
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- Consequências da alteração climática do Holocénico Médio nas zonas costeiras: Algarve, PortugalPublication . Moura, Delminda; Albardeiro, L.; Boski, T.; Veiga-Pires, C.; Rodrigues, A. L.Na costa Sul do Algarve, estão expostos aeolianitos correspondentes a duas fases morfogenéticas do Holocénico Médio, correlativas em parte, da alteração climática generalizada que ocorreu no hemisfério norte, cerca dos 8000 anos.
- Geochemistry, luminescence and innovative dose rate determination of a Chalcolithic calcite-rich negative featurePublication . Rodrigues, A. L.; Dias, M., I; Carlos Valera, António; Rocha, F.; Prudencio, M., I; Marques, R.; Cardoso, G.; Russo, D.An interdisciplinary approach comprising archaeological, chemical, mineralogical, and luminescence data was applied to a better understanding of the fill dynamic and chronologies of a calcite-rich negative archaeological feature from Southern Portugal. This work aims to contribute to the assessment of the human involvement in the backfilling actions of a negative archaeological feature from a Chalcolithic site, thus better defining the moments of its destruction and/or abandonment. There are well-known limitations of luminescence dating of calcite-rich materials, particularly in the dose rate determination. In this work, a proposal of two innovative protocols to determine the dose rate of calcite-rich contexts is discussed. A clear improvement of the dose rate estimation was obtained by using the "radionuclide weighed" protocol. The comprehensive used methodologies enabled to define the infill phases and the sources of the infill materials. The luminescence profiling studies were also useful to describe the infill processes, highlighting their discontinuity and pointing to different deposition rates. The luminescence ages obtained, when using the "radionuclide weighed" protocol proposed in this work, are closer to the archaeological evidence of a Chalcolithic occupation.
- The aeolinites as a proxy to sea-level changes. Armação de Pêra Bay (Algarve, South Portugal)Publication . Moura, Delminda; Albardeiro, L.; Rodrigues, A. L.; Veiga-Pires, C.; Boski, T.Na Baía de Armação de Pêra a semelhança da distribução geográfica e dos atributos sedimentológicos entre os aeolianitos e as dunas, fazem com que este sector litoral seja um laboratório ao ar livre de grande interesse para o estudo da relação entre a génese de aeolianitos e as variações do nível médio relativo do mar (NMRM).