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Sediment provenance of a carbonate bioclastic pocket beach—Le Dune(Ionian Sea,South Italy)

Journal of Palaeogeography 2022年第2期11卷 238-255页

作者： Isabella Lapietra Stefania Nunzia Lisco Salvatore Milli Beatrice Rossini Massimo Moretti Dipartimento di Scienze Della Terra e Geoambientali Universit a Degli Studi di BariVia Orabona 470124 BariItaly Dipartimento di Scienze Della Terra SapienzaUniversit a di RomaPiazzale Aldo Moro 500185 RomaItaly

This study focuses on the analysis of a carbonate bioclastic pocket beach located along a coastal sector of the Apulia Ionian Sea,Le Dune beach,South *** beach develops for about 800 m and it is exposed to the south-westerly and southerly *** sediments range from very coarse to medium-fine sands and they are mainly composed of bioclasts(more than 90%)which include molluscs,foraminifers,echinoderms,algae branched,bryozoans,spicules of sponges and *** study area is one part of a marine protected reserve characterised by 15 different habitats of the typical Mediterranean submerged populations and the presence of Posidonia oceanica *** aim of our research is to highlight the correlation between physical and biological processes influencing Le Dune beach dynamics and its sediment provenance by analysing the textural and compositional characteristics of beach sands,which is fundamental for pocket beach *** beach sand analysis,deriving from textural,compositional and bioclast investigations,underlines that one of the main indicators of the beach dynamics is the bioclast component,which provides relevant information about sand provenance and sediment *** beach constitutes a semi-close system only nourished by the shells of organisms and by the erosion of headlands and dunes without important sediment interchange with adjacent littoral sectors.

关键词： Pocket beach Carbonate sediment supply bioclast distribution Coastal dynamics

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