Cosmogenic evidence for limited local LGM glacial expansion, Denton Hills, Antarctica

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dc.contributor.authorJoy, Ken_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorStorey, BCen_AU
dc.contributor.authorDe Pascale, GPen_AU
dc.contributor.authorQuigley, Men_AU
dc.contributor.authorFujioka, Ten_AU
dc.date.accessioned2021-12-16T04:55:43Zen_AU
dc.date.available2021-12-16T04:55:43Zen_AU
dc.date.issued2017-12-15en_AU
dc.date.statistics2021-11-14en_AU
dc.description.abstractThe geomorphology of the Denton Hills provides insight into the timing and magnitude of glacial retreats in a region of Antarctica isolated from the influence of the East Antarctic ice sheet. We present 26 Beryllium-10 surface exposure ages from a variety of glacial and lacustrine features in the Garwood and Miers valleys to document the glacial history of the area from 10 to 286 ka. Our data show that the cold-based Miers, Joyce and Garwood glaciers retreated little since their maximum positions at 37.2 ± 6.9 (1σ n = 4), 35.1 ± 1.5 (1σ, n = 3) and 35.6 ± 10.1 (1σ, n = 6) ka respectively. The similar timing of advance of all three glaciers and the lack of a significant glacial expansion during the global LGM suggests a local LGM for the Denton Hills between ca. 26 and 51 ka, with a mean age of 36.0 ± 7.5 (1σ, n = 13) ka. A second cohort of exposure ages provides constraints to the behaviour of Glacial Lake Trowbridge that formerly occupied Miers Valley in the late Pleistocene. These data show active modification of the landscape from ∼20 ka until the withdrawal of ice from the valley mouths, and deposition of Ross Sea Drift, at 10–14 ka. © 2017 Elsevier Ltd.en_AU
dc.identifier.citationJoy, K., Fink, D., Storey, B., De Pascale, G. P., Quigley, M., & Fujioka, T. (2017). Cosmogenic evidence for limited local LGM glacial expansion, Denton Hills, Antarctica. Quaternary Science Reviews, 178, 89-101, doi:10.1016/j.quascirev.2017.11.002en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination89-101en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2017.11.002en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12497en_AU
dc.identifier.volume178en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectGeomorphologyen_AU
dc.subjectGlaciersen_AU
dc.subjectQuaternary perioden_AU
dc.subjectPleistocene epochen_AU
dc.subjectAntarcticaen_AU
dc.subjectPaleoclimatologyen_AU
dc.titleCosmogenic evidence for limited local LGM glacial expansion, Denton Hills, Antarcticaen_AU
dc.typeJournal Articleen_AU
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