Importance of sampling across an assemblage of glacial landforms for interpreting cosmogenic ages of deglaciation

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dc.contributor.authorStroeven, APen_AU
dc.contributor.authorFabel, Den_AU
dc.contributor.authorHarbor, Jen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorCaffee, Men_AU
dc.contributor.authorDahlgren, Ten_AU
dc.date.accessioned2011-12-06T02:00:38Zen_AU
dc.date.available2011-12-06T02:00:38Zen_AU
dc.date.issued2011-07-01en_AU
dc.date.statistics2011-12-06en_AU
dc.description.abstractDeglaciation chronologies for some sectors of former ice sheets are relatively poorly constrained because of the paucity of features or materials traditionally used to constrain the timing of deglaciation. In areas without good deglaciation varve chronologies and/or without widespread occurrence of material that indicates the start of earliest organic radiocarbon accumulations suitable for radiocarbon dating, typically only general patterns and chronologies of deglaciation have been deduced. However, mid-latitude ice sheets that had warm-based conditions close to their margins often produced distinctive deglaciation landform assemblages, including eskers, deltas, meltwater channels and aligned lineation systems. Because these features were formed or significantly altered during the last glaciation, boulder or bedrock samples from them have the potential to yield reliable deglaciation ages using terrestrial cosmogenic nuclides (TCN) for exposure age dating. Here we present the results of a methodological study designed to examine the consistency of TCN-based deglaciation ages from a range of deglaciation landforms at a site in northern Norway. The strong coherence between exposure ages across several landforms indicates great potential for using TCN techniques on features such as eskers, deltas and meltwater channels to enhance the temporal resolution of ice-sheet deglaciation chronologies over a range of spatial scales. (C) 2011 University of Washington.en_AU
dc.identifier.citationStroeven, A.P., Fabel, D., Harbor, J.M., Fink, D., Caffee, M.W., & Dahlgren, T. (2011). Importance of sampling across an assemblage of glacial landforms for interpreting cosmogenic ages of deglaciation. Quaternary Research, 76(1), 148-156. doi:10.1016/j.yqres.2011.04.004en_AU
dc.identifier.govdoc3743en_AU
dc.identifier.issn0033-5894en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleQuaternary Researchen_AU
dc.identifier.pagination148-156en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.yqres.2011.04.004en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3920en_AU
dc.identifier.volume76en_AU
dc.language.isoenen_AU
dc.publisherAcademic Press INC Elsevieren_AU
dc.subjectSamplingen_AU
dc.subjectIsotopesen_AU
dc.subjectGeomorphologyen_AU
dc.subjectAge estimationen_AU
dc.subjectCarbon 14en_AU
dc.subjectGlaciersen_AU
dc.titleImportance of sampling across an assemblage of glacial landforms for interpreting cosmogenic ages of deglaciationen_AU
dc.typeJournal Articleen_AU
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