The last deglaciation of Cape Adare, northern Victoria Land, Antarctica

Johnson, Joanne S. ORCID: https://orcid.org/0000-0003-4537-4447; Hillenbrand, Claus-Dieter ORCID: https://orcid.org/0000-0003-0240-7317; Smellie, John L.; Rocchi, Sergio. 2008 The last deglaciation of Cape Adare, northern Victoria Land, Antarctica. Antarctic Science, 20 (6). 581-587. 10.1017/S0954102008001417

Before downloading, please read NORA policies.

Text download.pdf - Published Version Restricted to NERC registered users only Download (405kB) | Request a copy

Abstract/Summary

We present two Be-10 exposure ages from erratic boulders at Cape Adare, northem Victoria Land. The exposure ages obtained suggest that Cape Adare was covered by ice during the last glacial period, and the younger age points to deglaciation around 16.2 ka. Comparison of our younger Be-10 exposure age with published radiocarbon dates for Adelie penguin occupation at Cape Adare suggests that the onset of penguin colonization (at 2-3 kyr before present) lagged behind the deglaciation by at least 11.5 kyr. These observations indicate that penguin colonization did not occur until several thousand years after ice free ground became available.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1017/S0954102008001417
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Glacial Retreat in Antarctica and Deglaciation of the Earth System BAS Programmes > Other
ISSN:	0954-1020
Additional Keywords:	Adelie penguin; cosmogenic isotopes; grounding-line; last glacial period; Ross Ice Shelf; Ross Sea
NORA Subject Terms:	Glaciology Zoology Ecology and Environment
Date made live:	17 Jan 2011 12:04 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11533

Actions (login required)

View Item

Document Downloads

More statistics for this item...