High-resolution sedimentary record of the last deglaciation from a high-altitude lake in Ethiopia

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dc.contributor.author Tiercelin, J. J.
dc.contributor.author Gibert, E.
dc.contributor.author Umer, M.
dc.contributor.author Bonnefille, R.
dc.contributor.author Disnar, J. R.
dc.contributor.author Lézine, A.-M.
dc.contributor.author Hureau-Mazaudier, D.
dc.contributor.author Travi, Y.
dc.contributor.author Keravis, D.
dc.contributor.author Lamb, H. F.
dc.date.accessioned 2011-02-14T12:40:01Z
dc.date.available 2011-02-14T12:40:01Z
dc.date.issued 2008-03
dc.identifier.citation Tiercelin , J J , Gibert , E , Umer , M , Bonnefille , R , Disnar , J R , Lézine , A-M , Hureau-Mazaudier , D , Travi , Y , Keravis , D & Lamb , H F 2008 , ' High-resolution sedimentary record of the last deglaciation from a high-altitude lake in Ethiopia ' Quaternary Science Review , vol 27 , no. 5-6 , pp. 449-467 . en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 157381
dc.identifier.other dspace: 2160/6114
dc.identifier.uri http://hdl.handle.net/2160/6114
dc.description Tiercelin, J. J., Gibert, E., Mohammed, M. U., Lamb, H. F., Disnar, J-R., Hureau, D., Bonnefille, R., Lezine, A-M., Travi, Y., Keravis, D. (2008). High resolution sedimentary record of a high-altitude lake in Ethiopia. Quaternary Science reviews, 27(5-6), 449-467. Sponsorship: INSU-CNRS “Corne de l’Afrique” Program en
dc.description.abstract Sedimentological and geochemical studies conducted on a 15.82-m long core collected from Lake Garba Guracha (Ethiopia) associated with a precise AMS-14C time-scale document a unique record of the sedimentary processes linked to the progressive retreat of a high-altitude glacier in the Bale Mountains since 17,000 yr cal BP. Lake sedimentation is interpreted as the result of discharges of meltwater and glaciogenic sediment which progressively filled the accommodation space generated by glacier retreat within the basin. Monogenic sediment originated from glacial erosion of the trachytic tuff forming the cirque floor. Ice melting ended progressively between 12,600 and 11,800 cal BP, as suggested by the decrease in sedimentation energy followed by a sharp change in sedimentary facies. From 11,800 cal BP, the lake reached its maximum development and clastic input was replaced by organic-rich sedimentation. This relates to a major increase of lake productivity, which lasted up to 4500 cal BP. From this period, a lowering in productivity reflects the widespread dryness which occurred throughout the East African tropics. en
dc.format.extent 19 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Review en
dc.title High-resolution sedimentary record of the last deglaciation from a high-altitude lake in Ethiopia en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.quascirev.2007.11.002
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Quaternary Environmental Change Group en
dc.description.status Peer reviewed en


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