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Maximum glacier extent of the Penultimate Glacial Cycle in the Upper Garonne Basin (Pyrenees): new chronological evidence

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dc.contributor.authorFernandes, Marcelo
dc.contributor.authorOliva, Marc
dc.contributor.authorVieira, Gonçalo
dc.contributor.authorPalacios, David
dc.contributor.authorFernández-Fernández, Jose M.
dc.contributor.authorDelmas, Magali
dc.contributor.authorGarcía-Oteyza, Julia
dc.contributor.authorSchimmelpfennig, Irene
dc.contributor.authorVentura, Josep
dc.contributor.authorAumaître, Georges
dc.contributor.authorKeddadouche, Karim
dc.date.accessioned2021-12-27T11:01:44Z
dc.date.available2021-12-27T11:01:44Z
dc.date.issued2021
dc.description.abstractThe Upper Garonne Basin included the longest glacier in the Pyrenees during the Late Pleistocene. During major glacial advances, the Garonne palaeoglacier flowed northwards along ~ 80 km from peaks of the axial Pyrenees exceeding 2800–3000 m until the foreland of this mountain range at the Loures–Barousse–Barbazan basin (LBBb), at 420–440 m. Here, the palaeoglacier formed a terminal moraine complex that is examined in this work. Based on geomorphological observations and a 12-sample data set of 10Be Cosmic-Ray Exposure (CRE) ages, the timing of the maximum glacial extent was constrained as well as the onset of the deglaciation from the end of the Last Glacial Cycle (LGC). Chronological data shows evidence that the external moraines in this basin were abandoned by the ice at the end of the Penultimate Glacial Cycle (PGC) and the onset of the Eemian Interglacial, at ~ 129 ka. No evidence of subsequent glacial advances or standstills occurred during the LGC in this basin were found, as the few existing datable boulders provided in the internal moraine showed inconsistent ages, thus probably being affected by post-glacial processes. The terminal basin was already deglaciated during the global Last Glacial Maximum at 24–21 ka, as revealed by exposure ages of polished surfaces at the confluence of the Garonne-La Pique valleys, 13 km south of the entrance of the LBBb. This study introduces the first CRE ages in the Pyrenees for the glacial advance occurred during the PGC and provides also new evidence that glaciers had already significantly shrunk during the LGM.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFernandes, M., Oliva, M., Vieira, G., et al. (2021). Maximum glacier extent of the Penultimate Glacial Cycle in the Upper Garonne Basin (Pyrenees): new chronological evidence. Environ Earth Sci, 80, 796. https://doi.org/10.1007/s12665-021-10022-zpt_PT
dc.identifier.doi10.1007/s12665-021-10022-zpt_PT
dc.identifier.eissn1866-6299
dc.identifier.issn1866-6280
dc.identifier.urihttp://hdl.handle.net/10451/50559
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relation02/SAICT/2017—32002pt_PT
dc.relationCentre of Geographical Studies
dc.relationCentre of Geographical Studies
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s12665-021-10022-zpt_PT
dc.subjectCentral Pyreneespt_PT
dc.subjectUpper Garonne Basinpt_PT
dc.subjectPenultimate Glacial Cyclept_PT
dc.subjectCosmic-ray exposure datingpt_PT
dc.subjectMorainespt_PT
dc.subjectPolished bedrockpt_PT
dc.titleMaximum glacier extent of the Penultimate Glacial Cycle in the Upper Garonne Basin (Pyrenees): new chronological evidencept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/00295/2020
oaire.awardNumberUIDP/00295/2020
oaire.awardTitleCentre of Geographical Studies
oaire.awardTitleCentre of Geographical Studies
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00295%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00295%2F2020/PT
oaire.citation.issue24pt_PT
oaire.citation.startPage796pt_PT
oaire.citation.titleEnvironmental Earth Sciencespt_PT
oaire.citation.volume80pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameVieira Fernandes
person.familyNameOliva
person.familyNameBrito Guapo Teles Vieira
person.familyNameFernández-Fernández
person.givenNameMarcelo
person.givenNameMarc
person.givenNameGonçalo
person.givenNameJose M.
person.identifierhttps://www.researchgate.net/profile/Marcelo-Fernandes-11
person.identifierG-5958-2010
person.identifier.ciencia-idDC16-4FD0-6F5B
person.identifier.ciencia-id5510-AC71-085A
person.identifier.ciencia-id2519-6583-CAEA
person.identifier.orcid0000-0001-6840-4317
person.identifier.orcid0000-0001-6521-6388
person.identifier.orcid0000-0001-7611-3464
person.identifier.orcid0000-0002-6948-1530
person.identifier.ridK-5423-2014
person.identifier.scopus-author-idhttps://www.scopus.com/authid/detail.uri?authorId=57204148423
person.identifier.scopus-author-id35225198700
person.identifier.scopus-author-id7005863976
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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