10Be ages from central east Greenland constrain the extent of the Greenland ice sheet during the Last Glacial Maximum

Lena Håkansson, Jason Briner, Helena Alexanderson, Ala Aldahan, Göran Possnert

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Traditional ice sheet reconstructions have suggested two distinctly different ice sheet regimes along the East Greenland continental margin during the Last Glacial Maximum (LGM): ice to the shelf break south of Scoresby Sund and ice extending no further than to the inner shelf at and north of Scoresby Sund. We report new 10Be ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average 10Be ages, calculated with an assumed maximum erosion rate of 1 cm/ka and no erosion (respectively, 17.3±2.3 ka and 15.1±1.7 ka) overlap with a period of increased sediment input to the Scoresby Sund fan (19-15 ka). The results presented here suggest that ice reached at least 250 m a.s.l. at the mouth of Scoresby Sund during the LGM and add to a growing body of evidence indicating that LGM ice extended onto the outer shelf in northeast Greenland.

Original languageEnglish
Pages (from-to)2316-2321
Number of pages6
JournalQuaternary Science Reviews
Volume26
Issue number19-21
DOIs
Publication statusPublished - Oct 2007
Externally publishedYes

ASJC Scopus subject areas

  • Global and Planetary Change
  • Ecology, Evolution, Behavior and Systematics
  • Archaeology
  • Archaeology
  • Geology

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