Encontrados 14 documentos, a visualizar página 1 de 2
Variability over time in the sources of South Portuguese Zone turbidites: evide...
Pereira, M Francisco; Ribeiro, C; Vilallonga, F; Chichorro, M; Drost, K; Albardeiro, L; Hofmann, M; Linnemann, UThis study combines geochemical and geo- chronological data in order to decipher the provenance of Carboniferous turbidites from the South Portuguese Zone (SW Iberia). Major and trace elements of 25 samples of graywackes and mudstones from the Me´rtola (Visean), Mira (Serpukhovian), and Brejeira (Moscovian) Forma- tions were analyzed, and 363 U-Pb ages were obtained on detrital zircons from five samples of gray...
Interannual sub-aerial beach variability along a sector of the Tróia- Sines emb...
Albardeiro, L.; Gama, C.; Marques da Silva, José Rafael; Baptista, P.The comprehension of sub-aerial beach variability of sandy beaches is essential to describe and predict his behaviour after extreme events (e.g. storms). Around the world coastline beach monitoring plans are established in order to characterize the main morphodynamic changes at different spatial and temporal scales. Within this scope, four field surveys (19th to 28th May 2009; 30th October to 10th November 2009...
A avaliação de risco sísmico no Algarve: efeito de sítio
Albardeiro, L.; Moura, DelmindaAs características físicas locais traduzem no seu todo, aquilo a que se designa por efeito de sítio, ou seja, a resposta do substrato geológico a um determinado estímulo como é, neste caso, a propagação de uma onda sísmica. Face a este estímulo, a conjugação dos vários atributos físicos locais, pode resultar na amplificação do movimento do substrato, no aumento do tempo do movimento e na geração de movimentos d...
Plataformas litorais no sul de Portugal: uma tentativa de datação com U/Th em c...
Veiga-Pires, C.; Ghaleb, Bassam; Campo, Leif; Albardeiro, L.; Moura, Delminda; Machado, NunoNa costa sul portuguesa, mais especificamente na zona central algarvia, foram identificadas várias plataformas litorais situadas acima da presente faixa intermareal.
The aeolinites as a proxy to sea-level changes. Armação de Pêra Bay (Algarve, S...
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).
Shore Platforms in the Algarve (South Portugal) Rocky Coast, an Inheritance of ...
Moura, Delminda; Veiga-Pires, C.; Albardeiro, L.; Boski, T.Shore platforms, notches, and marine caves are common yet distinctive morphological features along the southern coast of Portugal. The central Algarve rocky coast has provided a favorable setting in which to understand the processes contributing to shore platform development. This is because the morphology and characteristics of the features vary along the coast, as do several factors implicated in their develo...
Palaeosurface reconstruction based on sedimentary record and in sea level evolu...
Loureiro, C.; Boski, T.; Albardeiro, L.; Moura, Delminda; Terefenko, P.; Camacho, Sarita; Veiga-Pires, C.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](...)
Morphological features and processes in the central Algarve rocky coast (South ...
Moura, Delminda; Albardeiro, L.; Veiga-Pires, C.; Boski, T.; Tigano, EsterMorphological features along the Algarve rocky coast, South Portugal, are identified and described, with an emphasis on shore platforms and notches. The contributions of processes, such as wave attack, chemical weathering and bioerosion, to sculpting the shore platforms are discussed. The preferential localization of shore platforms on sites exposed to waves, and the lack of significant chemical weathering, poi...
Evolução da linha de costa durante a transgressão holocénica: Baía de Armação d...
Moura, Delminda; Albardeiro, L.; Veiga-Pires, C.; Boski, T.As zona costeiras são importantes zona húmidas, suporte de ecossistemas cuja conservação depende da estabilidade dos ambientes geológicos litorais. Estes respondem a numerosos factores, entre os quais a variação do nível médio do mar (nmm).(...)
Post last glacial maximum (LGM) shoreline evolution in the Algarve (south Portu...
Moura, Delminda; Albardeiro, L.; Veiga-Pires, C.; Boski, T.Aeolianites spanning the last 20 ka, are outcropping in a different geomorphological context along the Algarve coast, South Portugal. Here we use the term aeolianite as defined by Fairbidge and Johnson (1978), being a wind-blown sediment originating from the beach with a high carbonate content. The therefore it is related with sea-level fluctuations. However, other factors like coastal plain slope, marine envir...
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