Evidence for slow late-glacial ice retreat in the upper Rangitata Valley, South Island, New Zealand

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dc.contributor.authorShulmeister, Jen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorWinkler, Sen_AU
dc.contributor.authorThackray, GDen_AU
dc.contributor.authorBorsellino, Ren_AU
dc.contributor.authorHemmingsen, Men_AU
dc.contributor.authorRittenour, TMen_AU
dc.date.accessioned2021-12-16T21:01:34Zen_AU
dc.date.available2021-12-16T21:01:34Zen_AU
dc.date.issued2018-04-01en_AU
dc.date.statistics2021-11-16en_AU
dc.description.abstractA suite of cosmogenic radionuclide ages taken from boulders on lateral and latero-terminal moraines in the Rangitata Valley, eastern South Island, New Zealand demonstrates that relatively thick ice occupied valley reaches inland of the Rangitata Gorge until c. 21 ka. Thereafter ice began to thin, and by c. 17 ka it had retreated 33 km up-valley of the Rangitata Gorge to the Butler-Brabazon Downs, a structurally created basin in the upper Rangitata Valley. Despite its magnitude, this retreat represents a minor ice volume reduction from 21 ka to 17 ka, and numerous lateral moraines preserved suggest a relatively gradual retreat over that 4 ka period. In contrast to records from adjacent valleys, there is no evidence for an ice-collapse at c. 18 ka. We argue that the Rangitata record constitutes a more direct record of glacial response to deglacial climate than other records where glacial dynamics were influenced by proglacial lake development, such as the Rakaia Valley to the North and the major valleys in the Mackenzie Basin to the south-west. Our data supports the concept of a gradual warming during the early deglaciation in the South Island New Zealand. © 2018 Elsevier Ltd.en_AU
dc.identifier.citationShulmeister, J., Fink, D., Winkler, S., Thackray, G. D., Borsellino, R., Hemmingsen, M., & Rittenour, T. M. (2018). Evidence for slow late-glacial ice retreat in the upper Rangitata Valley, South Island, New Zealand. Quaternary Science Reviews, 185, 102-112. doi:10.1016/j.quascirev.2018.01.006en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination102-112en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2018.01.006en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12503en_AU
dc.identifier.volume185en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNew Zealanden_AU
dc.subjectIceen_AU
dc.subjectMorainesen_AU
dc.subjectGlaciersen_AU
dc.subjectClimatic changeen_AU
dc.subjectIsotope datingen_AU
dc.titleEvidence for slow late-glacial ice retreat in the upper Rangitata Valley, South Island, New Zealanden_AU
dc.typeJournal Articleen_AU
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