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Deglaciation and weathering of Larsemann Hills, East Antarctica

Citation

Kiernan, K and Gore, DB and Fink, D and White, DA and McConnell, A and Sigurdsson, IA, Deglaciation and weathering of Larsemann Hills, East Antarctica, Antarctic Science, 21, (4) pp. 373-382. ISSN 0954-1020 (2009) [Refereed Article]

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Copyright Statement

Copyright 2009 Cambridge University Press

Official URL: http://journals.cambridge.org

DOI: doi:10.1017/S0954102009002028

Abstract

In 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 2018 ka bp.

Item Details

Item Type:Refereed Article
Keywords:Broknes; Cosmogenic nuclide exposure age; Mumiyo; Salt geochemistry; Stornes
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Geomorphology and Regolith and Landscape Evolution
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Kiernan, K (Dr Kevin Kiernan)
Author:McConnell, A (Ms Anne McConnell)
ID Code:57964
Year Published:2009
Web of Science® Times Cited:11
Deposited By:Geography and Environmental Studies
Deposited On:2009-08-27
Last Modified:2010-04-13
Downloads:3 View Download Statistics

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