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dc.contributor.authorMetcalfe, Sarahen_UK
dc.contributor.authorSay, Alisonen_UK
dc.contributor.authorBlack, Stuarten_UK
dc.contributor.authorMcCulloch, Roberten_UK
dc.contributor.authorO'Hara, Sarahen_UK
dc.description.abstractA 467-cm core (B94/3) from the Alta Babicora basin in the Chihuahuan Desert, northern Mexico (29oN, 108oW), documents lake-level and climate changes over the past ca. 65,000 yr. Chronological control is provided by four accelerator mass spectrometry 14C dates and five U-series dates on diatom silica. The core has been analyzed for magnetic susceptibility, loss-on-ignition, carbonate content, sediment chemistry and mineralogy, and pollen and diatom composition. The basin was occupied by a deep freshwater lake throughout the late Pleistocene which, based on shoreline evidence, was at least 19 m deeper than today. The lake shallowed after ca. 57,000 yr B.P. High variability typified the period between 54,600 and 38,000 yr B.P., probably with periodic desiccation and deflation. A deep-water lake was reestablished after 38,000 yr B.P. and persisted until ca. 29,000 yr B.P. Shallowing occurred through the last glacial maximum, although the lake was still deeper than at present. The Pleistocene–Holocene transition was marked by a distinctive change in the diatom flora. There is no diatom record for much of the Holocene, but other proxies indicate generally dry, stable catchment conditions. The Babicora record is more akin to those from the southwest United States than it is to Central America and northern South America.Wet conditions in the late Pleistocene are attributed to winter rainfall from midlatitudes in contrast to the modern, tropical, summer rainfall regime.en_UK
dc.relationMetcalfe S, Say A, Black S, McCulloch R & O'Hara S (2002) Wet conditions during the last glaciation in the Chihuahuan Desert, Alta Babicora basin, Mexico. Quaternary Research, 57 (1), pp. 91-101.
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.subjectlate Pleistoceneen_UK
dc.subjectChihuahuan Deserten_UK
dc.titleWet conditions during the last glaciation in the Chihuahuan Desert, Alta Babicora basin, Mexicoen_UK
dc.typeJournal Articleen_UK
dc.rights.embargoreason[Metcalfe et al Babicora QR 2002.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.citation.jtitleQuaternary Researchen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationUniversity of Nottinghamen_UK
dc.contributor.affiliationUniversity of Sheffielden_UK
dc.contributor.affiliationUniversity of Readingen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Nottinghamen_UK
dc.subject.tagEnvironmental Geographyen_UK
dc.subject.tagEnvironmental Changeen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorMetcalfe, Sarah|en_UK
local.rioxx.authorSay, Alison|en_UK
local.rioxx.authorBlack, Stuart|en_UK
local.rioxx.authorMcCulloch, Robert|0000-0001-5542-3703en_UK
local.rioxx.authorO'Hara, Sarah|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameMetcalfe et al Babicora QR 2002.pdfen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

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