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1 results

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

  • Joanne S. Johnson, Claus-Dieter Hillenbrand, John L. Smellie, Sergio Rocchi
  • Journal:
    Antarctic Science / Volume 20 / Issue 6 / December 2008
    Published online by Cambridge University Press:
    02 June 2008, pp. 581-587

  • We present two 10Be exposure ages from erratic boulders at Cape Adare, northern 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 10Be exposure age with published radiocarbon dates for Adélie 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.