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Revised age estimate of the Mjáuvøtn tephra A on the Faroe Islands based on Bayesian modelling of 14C dates from two lake sequences |
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| Authors: | Jesper Olsen Esther Ruth Gudmundsdóttir Svante Björck Bent V Odgaard Jan Heinemeier |
| Institution: | 1. Department of Earth Sciences, University of Aarhus, Aarhus, Denmark;2. Earth Science Institute, University of Iceland, Reykjavík, Iceland;3. Department of Earth and Ecosystem Sciences, Division of Geology, Quaternary Sciences, Lund University, Lund, Sweden;4. Department of Physics and Astronomy, University of Aarhus, Aarhus, Denmark |
| Abstract: | Tephra horizons are potentially perfect time markers for dating and cross‐correlation among diverse Holocene palaeoenvironmental records such as ice cores and marine and terrestrial sequences, but we need to trust their age. Here we present a new age estimate of the Holocene Mjáuvøtn tephra A using accelerator mass spectrometry 14C dates from two lakes on the Faroe Islands. With Bayesian age modelling it is dated to 6668–6533 cal. a BP (68.2% confidence interval) – significantly older and better constrained than the previous age. Copyright © 2010 John Wiley & Sons, Ltd. |
| Keywords: | tephrochronology radiocarbon dating Mjá uvø tn tephra A Faroe Islands Holocene |