A multi-dating approach applied to proglacial sediments attributed to the Most Extensive Glaciation of the Swiss Alps

Andreas Dehnert, Frank Preusser, Jan D. Kramers, Naki Akçar, Peter W. Kubik, Regina Reber, Christian Schlüchter

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The number and the timing of Quaternary glaciations of the Alps are poorly constrained and, in particular, the age of the Most Extensive Glaciation (MEG) in Switzerland remains controversial. This ice advance has previously been tentatively correlated with the Riss Glaciation of the classical alpine stratigraphy and with Marine Isotope Stage (MIS) 6 (186-127ka). An alternative interpretation, based on pollen analysis and stratigraphic correlations, places the MEG further back in the Quaternary, with an age equivalent to MIS 12 (474-427ka), or even older. To re-evaluate this issue in the Swiss glaciation history, a multi-dating approach was applied to proglacial deltaic 'Höhenschotter' deposits in locations outside the ice extent of the Last Glacial Maximum. Results of U/Th and luminescence dating suggest a correlation of the investigated deposits with MIS 6 and hence with the Riss Glaciation. Cosmogenic burial dating suffered from large measurement uncertainties and unusually high 26Al/10Be ratios and did not provide robust age estimates.

Original languageEnglish
Pages (from-to)620-632
Number of pages13
JournalBoreas
Volume39
Issue number3
DOIs
Publication statusPublished - Jul 2010
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Archeology (arts and humanities)
  • Geology

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