Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/7830
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dc.contributor.authorDinis, P.pt
dc.contributor.authorBernardes, C.pt
dc.contributor.authorCallapez, P.pt
dc.contributor.authorCarvalho, M.pt
dc.date.accessioned2012-04-05T14:57:41Z-
dc.date.available2012-04-05T14:57:41Z-
dc.date.issued2009-
dc.identifier.issn0212-5919pt
dc.identifier.urihttp://hdl.handle.net/10773/7830-
dc.description.abstractA comparative study between Pliocene-Pleistocene and present day inner shelf deposits, considering both grain-size distribution and the present day hydrodynamic conditions, at west Portuguese Coastal Margin, is conducted. The modal grain-size analysis indicates that the west Portuguese Plio-Pleistocene inner shelf sediments are made of a mixture of several populations. The coarser populations (mode >0.5 mm, 1empty set) result from reworking of previous shoreface and beach deposits after storm events or are related with transgressive ravinement lags. The intermediate population, with modes around 0.125 to 0.250 mm (3 to 2empty set), should be in equilibrium with the hydrodynamic storm conditions in the inner shelf. This population is also the main constituent of the present day inner shelf cover between 10 and 25 meters depth. The finer population, with modes around 32 mu m (5empty set), is probably deposited from suspension during fair-weather periods. Under the high hydrodynamic winter storm conditions this population remains in suspension and tends to be mobilized to outer shelf locations by downward currents. It is expected that the mud size population proportion in bulk sediment should increases basinward, but this proportion may as well be influenced by post-depositional processes in ancient deposits.pt
dc.language.isoengpt
dc.publisherUniversidade de Vigopt
dc.relationFCT - POCI/CTEGEX/58120/2004pt
dc.rightsopenAccesspor
dc.subjectGrain-size distributionpt
dc.subjectModal sizept
dc.subjectInner shelfpt
dc.subjectPortuguese Continental Marginpt
dc.titleComparative study of inner shelf sediments (Plio-Pleistocene and present day cover) in the Western Portuguese marginpt
dc.typearticlept
dc.peerreviewedyespt
ua.distributioninternationalpt
degois.publication.firstPage9pt
degois.publication.issue2
degois.publication.issue2pt
degois.publication.lastPage20pt
degois.publication.titleThalassaspt
degois.publication.volume25pt
dc.relation.publisherversionhttp://webs.uvigo.es/thalassas/thalassas_marco%20principal.htmpt
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