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Retreat dynamics of the eastern sector of the British–Irish Ice Sheet during the last glaciation

Evans, David J.A.; Roberts, David H.; Bateman, Mark D.; Clark, Chris D.; Medialdea, Alicia; Callard, Louise; Grimoldi, Elena; Chiverrell, Richard C.; Ely, Jeremy; Dove, Dayton; Ó Cofaigh, Colm; Saher, Margot; Bradwell, Tom; Moreton, Steven G.; Fabel, Derek; Bradley, Sarah L.

Retreat dynamics of the eastern sector of the British–Irish Ice Sheet during the last glaciation Thumbnail


Authors

Mark D. Bateman

Chris D. Clark

Alicia Medialdea

Louise Callard

Elena Grimoldi

Richard C. Chiverrell

Jeremy Ely

Dayton Dove

Colm Ó Cofaigh

Margot Saher

Tom Bradwell

Steven G. Moreton

Derek Fabel

Sarah L. Bradley



Abstract

The findings of BRITICE‐CHRONO Transect 2 through the North Sea Basin and eastern England are reported. We define ice‐sheet marginal oscillation between ~31 and 16 ka, with seven distinctive former ice‐sheet limits (L1–7) constrained by Bayesian statistical analysis. The southernmost limit of the North Sea Lobe is recorded by the Bolders Bank Formation (L1; 25.8–24.6 ka). L2 represents ice‐sheet oscillation and early retreat to the northern edge of the Dogger Bank (23.5–22.2 ka), with the Garret Hill Moraine in north Norfolk recording a significant regional readvance to L3 at 21.5–20.8 ka. Ice‐marginal oscillations at ~26–21 ka resulted in L1, L2 and L3 being partially to totally overprinted. Ice‐dammed lakes related to L1–3, including Lake Humber, are dated at 24.1–22.3 ka. Ice‐sheet oscillation and retreat from L4 to L5 occurred between 19.7 and 17.3 ka, with grounding zone wedges marking an important transition from terrestrial to marine tidewater conditions, triggered by the opening of the Dogger Lake spillway between 19.9 and 17.5 ka. L6 relates to ice retreat under glacimarine conditions and final ice retreat into the Firth of Forth by 15.8 ka. L7 (~15 ka) represents an ice retreat from Bosies Bank into the Moray Firth.

Citation

Evans, D. J., Roberts, D. H., Bateman, M. D., Clark, C. D., Medialdea, A., Callard, L., …Bradley, S. L. (2021). Retreat dynamics of the eastern sector of the British–Irish Ice Sheet during the last glaciation. Journal of Quaternary Science, 36(5), 723-751. https://doi.org/10.1002/jqs.3275

Journal Article Type Article
Acceptance Date Jan 11, 2021
Online Publication Date Mar 10, 2021
Publication Date Jun 21, 2021
Deposit Date Apr 7, 2021
Publicly Available Date Mar 28, 2024
Journal Journal of Quaternary Science
Print ISSN 0267-8179
Electronic ISSN 1099-1417
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 36
Issue 5
Pages 723-751
DOI https://doi.org/10.1002/jqs.3275

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Early View: Online Version of Record before inclusion in an issue Copyright © 2021 The Authors Journal of Quaternary Science Published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.





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