Cosmogenic radionuclide chronology of pre-last glacial cycle moraines in the Western Arthur range, Southwest Tasmania

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dc.contributor.authorKiernan, Ken_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorGreig, Den_AU
dc.contributor.authorMifsud, Cen_AU
dc.date.accessioned2011-01-18T04:27:54Zen_AU
dc.date.available2011-01-18T04:27:54Zen_AU
dc.date.issued2010-11en_AU
dc.date.statistics2010-11en_AU
dc.description.abstractCosmogenic 10Be and 26Al exposure ages of 12 boulders from two moraine complexes in the Western Arthur Range of southwest Tasmania, which previously were considered to have been deposited during the Last Glacial Maximum, predate the Last Glacial Cycle. Zero-erosion minimum exposure ages range from 95 ka to 232 ka based on weighted mean 10Be and 26Al ages per boulder. For a reasonable choice of erosion rates, 10Be boulder ages range from 105 to 326 ka, respectively. Although a direct association of moraine construction to a specific marine isotope stage (MIS) glaciation is not definitive, erosion-corrected exposure ages indicate glacial advances commensurate with MIS-6 and -10, although the latter advance may be attributable to MIS-8 if the erosion rate correction is an over-estimate. Given the relatively close proximity of the dated moraines to their source cirques, this new cosmogenic glacial chronology implies a very limited extent for any younger glacial advances that occurred in the Western Arthur Range during the Last Glacial Cycle (post MIS-5) including the global LGM. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationKiernan, K., Fink, D., Greig, D., & Mifsud, C. (2010). Cosmogenic radionuclide chronology of pre-last glacial cycle moraines in the Western Arthur range, Southwest Tasmania. Quaternary Science Reviews, 29(23-24), 3286-3297. doi:10.1016/j.quascirev.2010.07.023en_AU
dc.identifier.govdoc3139en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.issue23-24en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination3286-3297en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.quascirev.2010.07.023en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2940en_AU
dc.identifier.volume29en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTasmaniaen_AU
dc.subjectBeryllium 10en_AU
dc.subjectAluminium 26en_AU
dc.subjectMorainesen_AU
dc.subjectRadioisotopesen_AU
dc.subjectRocksen_AU
dc.titleCosmogenic radionuclide chronology of pre-last glacial cycle moraines in the Western Arthur range, Southwest Tasmaniaen_AU
dc.typeJournal Articleen_AU
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