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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
Authors/Creators:	Kiernan, K and Gore, D and Fink, D and White, D and McConnell, A and Sugurdsson, I
Keywords:	Broknes; cosmogenic nuclide exposure age; mumiyo; salt geochemistry; Stornes
Journal or Publication Title:	Antarctic Science
ISSN:	0954-1020
DOI / ID Number:	https://doi.org/10.1017/S0954102009002028
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