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Architecture of the lower terraces and evolution of the Dordogne River at Bergerac (Southwest France) during the last glacial-interglacial cycle

hal.structure.identifierInstitut national de recherches archéologiques préventives [Inrap]
hal.structure.identifierDe la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]
dc.contributor.authorBERTRAN, Pascal
hal.structure.identifierResearch Laboratory for Archaeology and the History of Art [Oxford]
hal.structure.identifierIRAMAT-Centre de recherche en physique appliquée à l’archéologie [IRAMAT-CRP2A]
dc.contributor.authorFROUIN, Marine
hal.structure.identifierInstitut de Recherches sur les Archéomatériaux [IRAMAT]
hal.structure.identifierIRAMAT-Centre de recherche en physique appliquée à l’archéologie [IRAMAT-CRP2A]
dc.contributor.authorMERCIER, Norbert
dc.contributor.authorNAESSENS, Fabien
hal.structure.identifierInstitut national de recherches archéologiques préventives [Inrap]
dc.contributor.authorPRODEO, Frédéric
hal.structure.identifierDe la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]
dc.contributor.authorQUEFFELEC, Alain
dc.contributor.authorSIRIEIX, Colette
IDREF: 071604650
hal.structure.identifierDe la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]
dc.contributor.authorSITZIA, Luca
dc.date.accessioned2021-05-14T09:34:20Z
dc.date.available2021-05-14T09:34:20Z
dc.date.issued2013
dc.identifier.issn0267-8179
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/76125
dc.description.abstractEnThe lower terraces of the Dordogne River at Bergerac (south-west France) were studied in detail using cores, trenches, ground penetrating radar profiles, and 14 C, optically stimulated luminescence and infrared stimulated luminescence dating. This study shows that the lowest terrace (Fx) is made up of two major lithostratigraphic units: (i) dominantly horizontal gravel strata interpreted as compound bar deposits in a braided river, which pre-date 18-17 ka, and (ii) thick lateral accretion gravel units (point bars) formed in an anabranching river during the Late Pleniglacial and Lateglacial. Most of the anabranching channels were abandoned at ca. 11-10 ka following shrinkage of the river bed into a single meandering channel and were partially filled by gyttjas during the Boreal chronozone. Finally, the channels were plugged by overbank fines until about 5 ka. Floods seldom reached the Fx terrace during the late Holocene and accretion became negligible. The main phase of bedrock incision spanned the Holocene, whereas the period of channel adjustment to change in river regime during late Marine Isotope Stage (MIS) 2 only led to a redistribution of the Pleniglacial gravels. The higher terrace (Fw3) formed before the Eemian and was covered by colluvial fans, mainly during MIS 2 and 3.
dc.language.isoen
dc.publisherWiley
dc.subject.enrégion)
dc.subject.encours d'eau)
dc.subject.enhistoire de la Dordogne (France
dc.subject.enBergerac (Dordogne
dc.subject.enDordogne River
dc.subject.enfluvial dynamics
dc.subject.enHolocene
dc.subject.ensouth-west France
dc.subject.enWeichselian
dc.title.enArchitecture of the lower terraces and evolution of the Dordogne River at Bergerac (Southwest France) during the last glacial-interglacial cycle
dc.typeArticle de revue
dc.identifier.doi10.1002/jqs.2656
dc.subject.halSciences de l'Homme et Société/Archéologie et Préhistoire
bordeaux.journalJournal of Quaternary Science
bordeaux.page605--616
bordeaux.volume28
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-01743133
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01743133v1
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