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dc.contributor.authorArriolabengoa, Martín .
dc.contributor.authorIriarte Avilés, Eneko 
dc.contributor.authorAranburu, Arantza .
dc.contributor.authorYusta, Iñaki .
dc.contributor.authorArnold, Lee J. .
dc.contributor.authorDemuro, Martina .
dc.contributor.authorArrizabalaga, Alvaro .
dc.date.accessioned2018-06-18T08:41:30Z
dc.date.issued2018-10
dc.identifier.issn0037-0738
dc.identifier.urihttp://hdl.handle.net/10259/4808
dc.description.abstractMicromorphological analysis is an invaluable research tool for reconstructing detailed depositional and post-depositional processes of cave infill sequences and for providing paleoenvironmental insight. In this work, we present the results of a micromorphological and mineralogical study of the sedimentary sequence at the Lezetxiki II cave (northern Iberian Peninsula). The cave forms part of the Lezetxiki archaeological complex which has yielded early Middle Palaeolithic tools and archaic human remains. We have identified three main clastic sedimentary processes as being significant at Lezetxiki II: 1) fluviokarst or runoff processes, which are characterised by yellow sandy illite-rich microfacies; 2) infiltration processes, which produce a massive red silty-clay vermiculite-rich microfacies; and 3) inwash processes, which generate a reworked illite and vermiculite rich silty sand microfacies. The most common post-depositional processes observed are calcite precipitation infilling pore spaces, and compression structures derived from specific vertical loading events. In order to improve the chronological framework of the sedimentary sequence at Lezetxiki II, we have revised previous radiometric and relative dating results from faunal and archaeological remains and have dated the lowermost stratigraphic level using single-grain thermally-transferred optically-stimulated luminescence dating. Sedimentation at the Lezetxiki II cave started during Marine Isotope Stage (MIS) 7 through fluviokarst processes. We interpreted that runoff prevailed during MIS 6, while soil infiltration processes became more significant towards the MIS 5 optimum. Gradually, inwash processes prevailed over infiltration until the end of the interglacial phase. During the following glacial phases, runoff and erosion dominated but were subsequently replaced by inwash processes during MIS 1.en
dc.description.sponsorshipPALEOGATE project, funded by the Spanish Ministry of Economy and Competitiveness (HAR2014-53536-P) as well as the US14/16 project funded by the University of the Basque Country and Basque Coast Geopark, and Basque Government (IT1029-16-GBV6). We would also like to thank Tim Nicholson for his work in translating and editing different versions of the English text. Additional financial support for this research was provided by Australian Research Council (ARC) Future Fellowship project FT130100195, ARC Discovery Early Career Researcher Award DE160100743en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofSedimentary Geology. 2018, V. 372, p. 96-111en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCave sedimentary processesen
dc.subjectSedimentary petrologyen
dc.subjectSingle-grain datingen
dc.subjectPaleoenvironmental changesen
dc.subjectLezetxiki II caveen
dc.subject.otherPaleontologyen
dc.subject.otherPaleontologíaes
dc.titleReconstructing the sedimentary history of Lezetxiki II cave (Basque Country, northern Iberian Peninsula) using micromorphological analysisen
dc.typeinfo:eu-repo/semantics/article
dc.date.embargo2020-10
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1016/j.sedgeo.2018.05.006
dc.identifier.doi10.1016/j.sedgeo.2018.05.006
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/HAR2014-53536-P
dc.relation.projectIDinfo:eu-repo/grantAgreement/UPV-EHU/US14/16
dc.relation.projectIDGV/IT1029-16-GBV6
dc.relation.projectIDinfo:eu-repo/grantAgreement/ARC/FT130100195
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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