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Deglaciation and weathering of Larsemann Hills, East Antarctica

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Kiernan, K and Gore, D and Fink, D and White, D and McConnell, A and Sugurdsson, I (2009) Deglaciation and weathering of Larsemann Hills, East Antarctica. Antarctic Science, 21 (4). pp. 373-382. ISSN 0954-1020

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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 ,20–18 ka BP.

Item Type: Article
Keywords: Broknes; cosmogenic nuclide exposure age; mumiyo; salt geochemistry; Stornes
Journal or Publication Title: Antarctic Science
Page Range: pp. 373-382
ISSN: 0954-1020
Identification Number - DOI: 10.1017/S0954102009002028
Date Deposited: 29 Jun 2010 05:41
Last Modified: 18 Nov 2014 04:11
URI: http://eprints.utas.edu.au/id/eprint/9920
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