Identification of the Fugloyarbanki tephra in the NGRIP ice core: a key tie‐point for marine and ice‐core sequences during the last glacial period |
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| Authors: | S M Davies S Wastegård T L Rasmussen A Svensson S J Johnsen J P Steffensen K K Andersen |
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| Institution: | 1. School of the Environment and Society, Department of Geography, University of Wales Swansea, Swansea, UK;2. Department of Physical Geography and Quaternary Geology, Stockholm University, Stockholm, Sweden;3. Department of Geology, Faculty of Science, University of Troms?, Troms?, Norway;4. Ice and Climate group, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark |
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| Abstract: | A visible tephra horizon in the NGRIP ice core has been identified by geochemical analysis as the Fugloyarbanki Tephra, a widespread marker horizon in marine cores from the Faroe Islands area and the northern North Atlantic. An age of 26 740 ± 390 yr b2k (1σ uncertainty) is derived for this tephra according to the new Greenland Ice Core Chronology (GICC05) based on multi‐parameter counting of annual layers. Detection of this tephra for the first time within the NGRIP ice core provides a key tie‐point between marine and ice‐core records during the transition between MIS 3 and 2. Identification of this volcanic event within the Greenland records demonstrates the future potential of using tephrochronology to precisely correlate palaeoarchives in widely separated localities that span the last glacial period, as well as providing a potential method for examining the extent of the radiocarbon marine reservoir effect at this time. Copyright © 2008 John Wiley & Sons, Ltd. |
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| Keywords: | Greenland ice cores Fugloyarbanki Tephra major element geochemistry North Atlantic millennial‐scale fluctuations |
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