Holocene and pre-Holocene temporary disappearance of the George VI Ice Shelf, Antarctic Peninsula

C. Hjort*, M. J. Bentley, O. Ingólfsson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

We present evidence for the absence of the George VI Ice Shelf during a brief period in the mid-Holocene and during one or more earlier interstadials or interglacials. Barnacle Bathylasma corolliforme shells sampled from ice shelf moraines at Two Step Cliffs on Alexander Island have been dated to c. 5750-6000 14C yr BP(c. 6550-6850 cal yr BP) and imply seasonally open water in the George VI Sound during this period. Other shells are beyond the range of radiocarbon dating and imply open water during one or more previous interglacial or interstadial period, prior to 40 000 14C yr BP. Our results show that the ongoing collapse of some Antarctic Peninsula ice shelves is not unprecedented.

Original languageEnglish
Pages (from-to)296-301
Number of pages6
JournalAntarctic Science
Volume13
Issue number3
DOIs
Publication statusPublished - 2001

Other keywords

  • Alexander Island
  • Antarctic Peninsula
  • Glacial chronology
  • Ice shelf

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