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Deglaciation and weathering of Larsemann Hills, East Antarctica
journal contribution
posted on 2023-05-17, 00:04 authored by Kiernan, K, Gore, DB, Fink, D, White, DA, McConnell, A, Sigurdsson, IAIn situ cosmogenic 10Be exposure dating, radiocarbon determinations, salt and sediment geochemistry, and rock weathering observations indicate that parts of Larsemann Hills, East Antarctica have been subaerially exposed throughout much of the last glacial cycle, with the last glaciation occurring prior to 100 ka bp. Salt-enhanced subaerial weathering, coupled with a paucity of glacial erratics, made exposure age dating challenging. Rapid subaerial surface lowering in some places means that some exposure ages may underestimate the true age of deglaciation. Despite this uncertainty, the data are consistent with the absence of overriding by a thick ice sheet during the Last Glacial Maximum 20–18 ka bp.
History
Publication title
Antarctic ScienceVolume
21Issue
4Pagination
373-382ISSN
0954-1020Department/School
School of Geography, Planning and Spatial SciencesPublisher
Cambridge Univ PressPlace of publication
40 West 20Th St, New York, USA, Ny, 10011-4211Rights statement
Copyright © 2009 Cambridge University PressRepository Status
- Restricted