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Impact des oscillations climatiques rapides du dernier cycle glaciaire sur l'érosion et les transferts sédimentaires dans le sud des Alpes (SE France) ArchiMer
Bonneau, Lucile.
While dominant processes and time-scales controlling denudation rates are intensively debated, past terrigenous input remains difficult to detect from the marine sedimentary record, especially during the Quaternary because of the strong overprint exerted by the sea-level changes. In this study, we focus on the Var sediment-routing system (SE France) where the absence of a continental shelf off the Var river mouth (Ligurian margin, NW Mediterranean Sea) resulted in the direct connection between the Var River and the deep basin during both highstand and lowstand conditions. Moreover hyperpycnal flow initiated during Var floods are the main sediment transfer processes in the Var turbidite system, making changes in sediment supply within headwater source...
Tipo: Text Palavras-chave: Transferts sédimentaires; Système turbiditique; Traçage des sources sédimentaires; Fleuve Var; Dernier cycle glaciaire; Courants Hyperpycnaux; Sédiments marins; Glaciations.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00499/61028/64434.pdf
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Reconstruction des transferts sédimentaires en provenance du système glaciaire de Mer d'Irlande et du paléofleuve Manche au cours des derniers cycles climatiques ArchiMer
Toucanne, Samuel.
The Pleistocene has been period of fluctuating climate accompanied by prominent sea-level lowstands during the glacial intervals, when massive continental ice sheets extended from mountainous to lowland European areas. The retreat of the shoreline on the extensive present-day shallow continental shelf of the southern part of the British Isles induced the appearance of the 'Fleuve Manche' palaeoriver, one of the largest systems that drained the European continent. Sedimentary records from the Bay of Biscay offer an independent record allowing the reconstruction of the freshwater and sediment discharges of the 'Fleuve Manche', and the possibility of detecting the imprint of surrounding ice-sheet oscillations and attendant modification of hinterland drainage...
Tipo: Text Palavras-chave: Land sea correlations; European fluvial system; Glacial Irish Sea system; 'Fleuve Manche' palaeoriver; Ice sheets; Glaciations; Climate; Pleistocene; Turbidite systems; Sediment transfer; Bay of Biscay; Corrélations terre mer; Réseau de drainage européen; Système glaciaire de Mer d'Irlande; Fleuve Manche; Calottes glaciaires; Glaciations; Climat; Pléistocène; Systèmes turbiditiques; Transferts sédimentaires; Golfe de Gascogne.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6328.pdf
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