No Cover Image

Journal article 275 views 47 downloads

The dating and correlation of an eastern Mediterranean lake sediment sequence: a 46–4 ka tephrostratigraphy for Ioannina (NW Greece)

Amy M. McGuire Orcid Logo, Christine S. Lane, Katherine H. Roucoux, Paul Albert Orcid Logo, Rebecca Kearney

Journal of Quaternary Science, Volume: 37, Issue: 8, Pages: 1313 - 1331

Swansea University Author: Paul Albert Orcid Logo

  • 60634_VoR.pdf

    PDF | Version of Record

    © 2022 The Authors. This is an open access article under the terms of the Creative Commons Attribution License

    Download (3.49MB)

Check full text

DOI (Published version): 10.1002/jqs.3452

Abstract

Terrestrial archives from the Mediterranean have been crucial to expanding our understanding of past environmental variability on a range of timescales. Dating Quaternary sequences in the Mediterranean is, however, often challenging, and age models often have large chronological uncertainties. Tephr...

Full description

Published in: Journal of Quaternary Science
ISSN: 0267-8179 1099-1417
Published: Wiley 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa60634
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: Terrestrial archives from the Mediterranean have been crucial to expanding our understanding of past environmental variability on a range of timescales. Dating Quaternary sequences in the Mediterranean is, however, often challenging, and age models often have large chronological uncertainties. Tephra deposits can provide crucial age control for detailed environmental reconstructions on sub‐centennial timescales. Here, tephra analysis is undertaken for the first time on a sediment core (I‐08) from Lake Ioannina, northwest Greece, for the interval spanning 46–4 ka bp. Detailed visible and ‘crypto‐’ tephra analysis identifies deposits associated with explosive volcanism at Italian volcanic sources, including Campi Flegrei, Pantelleria, and the Aeolian Islands. We identify two visible tephra layers, the Campanian Ignimbrite (CI/Y‐5; ca. 39.8 ka bp) and Pantelleria Green Tuff (PGT/Y‐6; ca. 45.7 ka), as well as the Holocene Vallone del Gabellotto cryptotephra marker (VG/E‐1; ca. 8.3 ka bp). Evidence for repeated remobilisation and redeposition of CI tephra material is outlined, and the potential mechanisms and effects of sediment reworking in lake environments are examined. Bayesian modelling, which incorporates the new tephra ages with earlier radiocarbon dates, extends the I‐08 core chronology back to ca. 46 ka bp, facilitating direct correlation of the Ioannina sequence to others in the Mediterranean region.
Item Description: Data availability statement: The data that supports the findings of this study are available in the supplementary material of this article.
Keywords: Ioannina; last glacial cycle; Mediterranean; palaeolimnology; tephrochronology
College: Faculty of Science and Engineering
Funders: Department of Geography, University of Cambridge; Natural Environment Research Council Grant: NE/E015670/1, NE/L002612/1
Issue: 8
Start Page: 1313
End Page: 1331