Cosmogenic 10Be and 26A1 exposure ages of glaciations in the Frankland Range, southwest Tasmania reveal a limited MIS-2 ice advance

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dc.contributor.authorKiernan, Ken_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorMcConnell, Aen_AU
dc.date.accessioned2021-12-16T04:35:38Zen_AU
dc.date.available2021-12-16T04:35:38Zen_AU
dc.date.issued2017-02-01en_AU
dc.date.statistics2021-11-14en_AU
dc.description.abstractNew mapping of the glacial geomorphology coupled with 10Be and 26Al exposure age dating of moraines on the flanks of the Frankland Range in south west Tasmania indicate that glacier extent during MIS-2 was far smaller than during earlier glaciations with the ice cover being confined to only the uppermost cirques of the range. Moraines further down the range flanks, ∼50–150 m lower in altitude than the MIS-2 dated advance, indicate that glaciers were only slightly larger during earlier glaciations and, depending on the interpretation of their exposure ages, may range from MIS 7 to MIS 12. These older moraines are nested inside the maximum ice limits of an even more ancient and extensive glaciation, defined by degraded valley floor moraines and coalescing glacio-fluvial fans that remain undated but appear no younger than MIS 12. Patterns of glacial erosion and moraine deposition on the Frankland Range suggest that the more recent glaciations were increasingly influenced by the erosional morphology initiated by earlier glaciers. Microclimatic differences resulting from this earlier glacial topography were particularly influential determinants of glaciation during MIS 2. These results are consistent with emerging evidence from studies of other ranges in southwest Tasmania. Crown Copyright © 2016 Published by Elsevier Ltd.en_AU
dc.identifier.citationKiernan, K., Fink, D., McConnell, A. (2017). Cosmogenic 10Be and 26A1 exposure ages of glaciations in the Frankland Range, southwest Tasmania reveal a limited MIS-2 ice advance. Quaternary Science Reviews, 157, 141-151. doi:10.1016/j.quascirev.2016.12.008en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination141-151en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2016.12.008en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12493en_AU
dc.identifier.volume157en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTasmaniaen_AU
dc.subjectAustraliaen_AU
dc.subjectAge estimationen_AU
dc.subjectTopographyen_AU
dc.subjectQuaternary perioden_AU
dc.subjectGlaciersen_AU
dc.subjectIceen_AU
dc.subjectClimatesen_AU
dc.subjectErosionen_AU
dc.subjectMorainesen_AU
dc.subjectMorphologyen_AU
dc.titleCosmogenic 10Be and 26A1 exposure ages of glaciations in the Frankland Range, southwest Tasmania reveal a limited MIS-2 ice advanceen_AU
dc.typeJournal Articleen_AU
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