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African humid periods triggered the reactivation of a large river system in Western Sahara

hal.structure.identifierLaboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorSKONIECZNY, C.
hal.structure.identifierASP 2015
dc.contributor.authorPAILLOU, Philippe
hal.structure.identifierLaboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
dc.contributor.authorBORY, A.
hal.structure.identifierRoyal Museum for Central Africa [Tervuren] [RMCA]
hal.structure.identifierUnité Géosciences Marines [GM]
dc.contributor.authorBAYON, G.
hal.structure.identifierService Hydrographique et Océanographique de la Marine [SHOM]
dc.contributor.authorBISCARA, L.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, X.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEYNAUD, F.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMALAIZÉ, B.
hal.structure.identifierGéoazur [GEOAZUR 6526]
dc.contributor.authorREVEL, Michel
hal.structure.identifierCentre de Formation et de Recherche sur les Environnements Méditérranéens [CEFREM]
dc.contributor.authorALEMAN, N.
hal.structure.identifierCentre de Formation et de Recherche sur les Environnements Méditérranéens [CEFREM]
dc.contributor.authorBARUSSEAU, J. -P.
hal.structure.identifierInstitut Mauritanien de Recherche Scientifique
dc.contributor.authorVERNET, R.
hal.structure.identifierASP 2015
dc.contributor.authorLOPEZ, S.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGROUSSET, F.
dc.date.issued2015-11-10
dc.identifier.issn2041-1723
dc.description.abstractEnThe Sahara experienced several humid episodes during the late Quaternary, associated with the development of vast fluvial networks and enhanced freshwater delivery to the surrounding ocean margins. In particular, marine sediment records off Western Sahara indicate deposition of river-borne material at those times, implying sustained fluvial discharges along the West African margin. Today, however, no major river exists in this area; therefore, the origin of these sediments remains unclear. Here, using orbital radar satellite imagery, we present geomorphological data that reveal the existence of a large buried paleodrainage network on the Mauritanian coast. On the basis of evidence from the literature, we propose that reactivation of this major paleoriver during past humid periods contributed to the delivery of sediments to the Tropical Atlantic margin. This finding provides new insights for the interpretation of terrigenous sediment records off Western Africa, with important implications for our understanding of the paleohydrological history of the Sahara.
dc.description.sponsorshipLabexMER Marine Excellence Research: a changing ocean
dc.language.isoen
dc.publisherNature Publishing Group
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enGeology and geophysics
dc.subject.enClimate science
dc.subject.enEarth sciences
dc.title.enAfrican humid periods triggered the reactivation of a large river system in Western Sahara
dc.typeArticle de revue
dc.identifier.doi10.1038/ncomms9751
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.journalNature Communications
bordeaux.page8751
bordeaux.volume6
bordeaux.peerReviewedoui
hal.identifierhal-01250419
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01250419v1
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