Kearney, R., Albert, P.G., Staff, R.A. , Pál, I., Veres, D., Magyari, E. and Bronk Ramsey, C. (2018) Ultra-distal fine ash occurrences of the Icelandic Askja-S Plinian eruption deposits in Southern Carpathian lakes: new age constraints on a continental scale tephrostratigraphic marker. Quaternary Science Reviews, 188, pp. 174-182. (doi: 10.1016/j.quascirev.2018.03.035)
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Abstract
Here we present the results of the first cryptotephra investigation of two Late glacial-Holocene lake records from the Southern Carpathian Mountains in Romania, Lake Brazi and Lake Lia. The discovery of an important Icelandic tephrostratigraphic marker, the Askja-S, in the sedimentary records of both sites significantly extends the known ash dispersal from this Plinian eruption. Bayesian age-depth modelling of available radiocarbon (14C) data from both sedimentary records allows us to further refine the depositional age of this ultra-distal tephra. In combination with age constraints on the tephra from other well-dated European sites, we produce an updated age for this key tephrostratigraphic marker of 10,824 ± 97 cal yrs BP (95.4% range). The Askja-S tephra is stratigraphically positioned after the palaeoenvironmental proxy response to the Preboreal Oscillation at both sites. The widespread distribution of this tephra across Europe offers the potential to assess spatio-temporal variability of this climatic signal. The discovery of the Askja-S in lake records from the Southern Carpathians highlights the likelihood of finding other ultra-distal (Icelandic) cryptotephra marker layers within the region. Additionally, given the location of the Carpathian region, it offers the opportunity to further enhance and integrate tephrostratigraphic frameworks of north-western Europe with those of the Mediterranean and Anatolia regions, which will enable a more precise comparison of palaeoenvironmental archives across Europe.
| Item Type: | Articles |
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| Additional Information: | RK is funded by the UK National Environmental Research Council (NERC; grants: NE/L002612/1) as part of the Environmental Research Doctoral Training Program at the University of Oxford. PGA and RAS are supported by Early Career Fellowships from the Leverhulme Trust (grants: ECF-2014-438 and ECF-2015-396). Drilling and palaeoenvironmental study of Lake Brazi and Lake Lia was supported by the Hungarian OTKA grantNF 101362 and GINOP-2.3.2-15-2016-00009. EU-DEM map produced using Copernicus data and information funded by the European Union – EU-DEM layers. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Staff, Dr Richard |
| Authors: | Kearney, R., Albert, P.G., Staff, R.A., Pál, I., Veres, D., Magyari, E., and Bronk Ramsey, C. |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Quaternary Science Reviews |
| Publisher: | Elsevier |
| ISSN: | 0277-3791 |
| ISSN (Online): | 1873-457X |
| Published Online: | 10 April 2018 |
| Copyright Holders: | Copyright © 2018 Elsevier Ltd. |
| First Published: | First published in Quaternary Science Reviews 188: 174-182 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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