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Distal cryptotephra records in the Falkland Islands refine South American tephrochronology

Panayiotis Panaretos Orcid Logo, Alistair J. Monteath Orcid Logo, Zoë A. Thomas Orcid Logo, Paul Albert Orcid Logo, Britta J.L. Jensen, James Tamhane, Shaun Woudstra Orcid Logo, Gwydion Jones, Rob Scaife, Michael J. Bentley Orcid Logo

Quaternary Science Reviews, Volume: 369, Start page: 109599

Swansea University Authors: Paul Albert Orcid Logo, Gwydion Jones

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DOI (Published version): 10.1016/j.quascirev.2025.109599

Abstract

Cryptotephra (non-visible volcanic ash) deposits in the Falkland Islands (Islas Malvinas) provide a distal record of South American volcanism and ash dispersal into the South Atlantic Ocean. Here, we present three new cryptotephra records from peatlands in the archipelago and use these data to refin...

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Published in: Quaternary Science Reviews
ISSN: 0277-3791
Published: Elsevier BV 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa71409
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spelling 2026-03-13T14:57:53.1284849 v2 71409 2026-02-12 Distal cryptotephra records in the Falkland Islands refine South American tephrochronology 7f8db9327402511d4d92849cb79af644 0000-0002-6757-1452 Paul Albert Paul Albert true false 60e37970b281337e44731ed4c197e930 Gwydion Jones Gwydion Jones true false 2026-02-12 BGPS Cryptotephra (non-visible volcanic ash) deposits in the Falkland Islands (Islas Malvinas) provide a distal record of South American volcanism and ash dispersal into the South Atlantic Ocean. Here, we present three new cryptotephra records from peatlands in the archipelago and use these data to refine the age estimates of key regional tephra isochrons. Major-minor-trace element glass geochemistry and high-resolution radiocarbon chronologies were used to correlate cryptotephra deposits with known explosive eruptions at Reclus volcano (R1), Monte Burney and Hudson volcano (H2). We also identify cryptotephra deposits likely originating from Chaitén volcano, the Antillanca volcanic complex and two Mid Holocene eruptions of Aguilera volcano. Careful examination of major-minor element data from tephras linked with Monte Burney MB1 demonstrates discrepancies between medial and distal deposits preserved in Patagonia, Laguna Potrok Aike and the Falkland Islands. These suggest that two Early Holocene tephra deposits from Monte Burney may be widely distributed. Our integrated Bayesian age-depth model refines the median ages of Hudson H2 (4230–3775 calibrated years before present; cal yr BP), deposits from Monte Burney (as viewed from the Falkland Islands, 9540-9455 cal yr BP) and Reclus volcano R1 (14,800-14,060 cal yr BP). We also propose that the age of Aguilera A1 is older than previously suggested and dates to 4390-4150 cal yr BP. Our expanded geochemical dataset of volcanic glasses and new age constraints for these isochrons aid distal and near source tephra correlations and complement the current tephrochronological framework of the region. Journal Article Quaternary Science Reviews 369 109599 Elsevier BV 0277-3791 Tephrochronology; Falklands; Cryptotephra; Radiocarbon dating; South America; Southern ocean; Monte Burney; Reclus; Hudson; Chaitén; Aguilera 1 12 2025 2025-12-01 10.1016/j.quascirev.2025.109599 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Another institution paid the OA fee UKRI FLF (MR/ S035478/1, MR/Y011767/1) 2026-03-13T14:57:53.1284849 2026-02-12T15:29:53.9111357 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Panayiotis Panaretos 0000-0001-5734-0741 1 Alistair J. Monteath 0009-0000-0199-9926 2 Zoë A. Thomas 0000-0002-2323-4366 3 Paul Albert 0000-0002-6757-1452 4 Britta J.L. Jensen 5 James Tamhane 6 Shaun Woudstra 0009-0001-9260-3735 7 Gwydion Jones 8 Rob Scaife 9 Michael J. Bentley 0000-0002-2048-0019 10 71409__36412__fe443c38fbff47ec8fd313f46b6dd1b7.pdf 71409.VoR.pdf 2026-03-13T14:55:57.0905948 Output 12130817 application/pdf Version of Record true © 2025 The Authors. This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/
title Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
spellingShingle Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
Paul Albert
Gwydion Jones
title_short Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
title_full Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
title_fullStr Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
title_full_unstemmed Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
title_sort Distal cryptotephra records in the Falkland Islands refine South American tephrochronology
author_id_str_mv 7f8db9327402511d4d92849cb79af644
60e37970b281337e44731ed4c197e930
author_id_fullname_str_mv 7f8db9327402511d4d92849cb79af644_***_Paul Albert
60e37970b281337e44731ed4c197e930_***_Gwydion Jones
author Paul Albert
Gwydion Jones
author2 Panayiotis Panaretos
Alistair J. Monteath
Zoë A. Thomas
Paul Albert
Britta J.L. Jensen
James Tamhane
Shaun Woudstra
Gwydion Jones
Rob Scaife
Michael J. Bentley
format Journal article
container_title Quaternary Science Reviews
container_volume 369
container_start_page 109599
publishDate 2025
institution Swansea University
issn 0277-3791
doi_str_mv 10.1016/j.quascirev.2025.109599
publisher Elsevier BV
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description Cryptotephra (non-visible volcanic ash) deposits in the Falkland Islands (Islas Malvinas) provide a distal record of South American volcanism and ash dispersal into the South Atlantic Ocean. Here, we present three new cryptotephra records from peatlands in the archipelago and use these data to refine the age estimates of key regional tephra isochrons. Major-minor-trace element glass geochemistry and high-resolution radiocarbon chronologies were used to correlate cryptotephra deposits with known explosive eruptions at Reclus volcano (R1), Monte Burney and Hudson volcano (H2). We also identify cryptotephra deposits likely originating from Chaitén volcano, the Antillanca volcanic complex and two Mid Holocene eruptions of Aguilera volcano. Careful examination of major-minor element data from tephras linked with Monte Burney MB1 demonstrates discrepancies between medial and distal deposits preserved in Patagonia, Laguna Potrok Aike and the Falkland Islands. These suggest that two Early Holocene tephra deposits from Monte Burney may be widely distributed. Our integrated Bayesian age-depth model refines the median ages of Hudson H2 (4230–3775 calibrated years before present; cal yr BP), deposits from Monte Burney (as viewed from the Falkland Islands, 9540-9455 cal yr BP) and Reclus volcano R1 (14,800-14,060 cal yr BP). We also propose that the age of Aguilera A1 is older than previously suggested and dates to 4390-4150 cal yr BP. Our expanded geochemical dataset of volcanic glasses and new age constraints for these isochrons aid distal and near source tephra correlations and complement the current tephrochronological framework of the region.
published_date 2025-12-01T05:34:00Z
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