Geochronology of Betula extensions in pollen diagrams of Alpine Late-glacial lake deposits:A case study of the Late-glacial deposits of the Gasserplatz soil archives (Vorarlberg, Austria)

Pollen diagrams of Alpine Late-glacial calcareous lake deposits show several extensions of Betula. The geochronology of these extensions cannot be based on radiocarbon dating due to reservoir effects of such lakes on the radiocarbon ages. A robust geochronology can be based on the oxygen isotope str...

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Bibliographic Details
Published in:Quaternary International
Main Authors: van Mourik, Jan M., Slotboom, Ruud T., van der Plicht, Johannes, Streurman, Harm Jan, Kuijper, Wim J., Hoek, Wim Z., de Graaff, Leo W. S.
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
ICE-CORE
LAST TERMINATION
OXYGEN-ISOTOPE
YOUNGER DRYAS
EUROPE
BP
OSCILLATIONS
CHRONOLOGY
SEDIMENTS
PROTOCOL
Alpine Lake
Glacial Lake
Greenland
Greenland ice cores
ice core
Online Access:https://hdl.handle.net/11370/1cdb010d-a939-429e-ac17-aa03ffe50504
https://research.rug.nl/en/publications/1cdb010d-a939-429e-ac17-aa03ffe50504
https://doi.org/10.1016/j.quaint.2013.04.018
https://pure.rug.nl/ws/files/6799686/2013QuatIntvMourik.pdf
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Summary:Pollen diagrams of Alpine Late-glacial calcareous lake deposits show several extensions of Betula. The geochronology of these extensions cannot be based on radiocarbon dating due to reservoir effects of such lakes on the radiocarbon ages. A robust geochronology can be based on the oxygen isotope stratigraphy. Additionally, recognition of 12,920 calBP LST in the sediment cores provides a secure time marker. The combined results of pollen, macro-remains and stable isotope analyses of the Gasserplatz cores point to a correlation of the Betula extensions with the oscillations in the oxygen isotope curve and are related to global climatic oscillations. This is sustained by the correlation of the Gasserplatz isotope oscillations with the oscillations as registered in the Greenland ice cores. Comparison of the results of the Gasserplatz cores with the results of similar Alpine lake deposits makes clear that the fluctuations in the Betula curve are not a local but a regional phenomenon. (C) 2013 Elsevier Ltd and INQUA. All rights reserved.

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