Sedimentary and foraminiferal records of Late Quaternary environmental change west of Ireland and implications for the last British-Irish Ice Sheet

Jared Peters; Sara Benetti; Paul Dunlop; Andrew, J Wheeler

doi:10.1002/jqs.3208

Sedimentary and foraminiferal records of Late Quaternary environmental change west of Ireland and implications for the last British-Irish Ice Sheet

Jared Peters, Sara Benetti, Paul Dunlop, Andrew, J Wheeler

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Abstract

Palaeoenvironmental change following deglaciation of the last British–Irish Ice Sheet on the continental shelf west of Ireland was investigated using multiproxy analyses of sediment and foraminifera data from nine sediment cores. Lithofacies associations record various depositional regimes across the shelf, which evolve from subglacial to postglacial conditions. Census data provide the first characterisation of benthic foraminifera populations across the continental shelf and multivariate analyses reveal three distinct biotopes. Biomineralization within these biotopes is restricted to ≤21 200 cal a BP by four radiocarbon ages. The transition from glacial to postglacial benthic foraminifera populations near the shelf break marks the establishment of productive, nutrient-rich, ice-distal conditions at ~20 900 cal a BP; these conditions may also mark the start of favourable conditions for postglacial cold-water coral growth. Postglacial conditions on the inner shelf were not established until <14 500 cal a BP, suggesting glacial conditions west of Ireland may have persisted into the Bølling–Allerød Interstadial.

Original language	English
Pages (from-to)	609-624
Number of pages	16
Journal	Journal of Quaternary Science
Volume	35
Issue number	5
Early online date	6 May 2020
DOIs	https://doi.org/10.1002/jqs.3208
Publication status	Published (in print/issue) - 1 Jul 2020

Bibliographical note

Funding Information:
Grateful thanks to Colm ? Cofaigh for his support during this research, Christian Wilson of Ocean DTM for Olex data-acquisition support, Robin Edwards at Trinity College, Dublin for the use of his MALVERN Mastersizer for grain size analyses and sample processing, and Stephen McCarron at the National University of Ireland, Maynooth, for the use of the GEOTEK multi-sensor core logger. Funding for AMS radiocarbon dates was provided by the International Association of Sedimentologists (Postgraduate Research Grant, 1st session, 2014), the UK Natural Environment Research Council grant; BRITICE-CHRONO NE/J009768/1, and the Raidi? Teilif?s ?ireann (RTE) broadcasting company for the television programme ?The Investigators?. We would like to thank the Captain and Crew of the RV Celtic Explorer, cruise participants and Mr ?odhan Fitzgerald of the Marine Institute, for their invaluable assistance during cruises CE10008 and CE14004 (WICPro). The research surveys were carried out under the Sea Change strategy with the support of the Marine Institute and the Marine Research Sub-programme of the National Development Plan 2007?2013.

Publisher Copyright:
© 2020 John Wiley & Sons, Ltd.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

Benthic foraminifera
British-Irish Ice Sheet
Climate
Deglacial marine environments
Irish continental shelf
British–Irish Ice Sheet
deglacial marine environments
climate
benthic foraminifera

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/jqs.3208

Peters_etal_(2020)_JQS_acceptedAuthor Accepted Manuscript, 1.58 MB

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title = "Sedimentary and foraminiferal records of Late Quaternary environmental change west of Ireland and implications for the last British-Irish Ice Sheet",

abstract = "Palaeoenvironmental change following deglaciation of the last British–Irish Ice Sheet on the continental shelf west of Ireland was investigated using multiproxy analyses of sediment and foraminifera data from nine sediment cores. Lithofacies associations record various depositional regimes across the shelf, which evolve from subglacial to postglacial conditions. Census data provide the first characterisation of benthic foraminifera populations across the continental shelf and multivariate analyses reveal three distinct biotopes. Biomineralization within these biotopes is restricted to ≤21 200 cal a BP by four radiocarbon ages. The transition from glacial to postglacial benthic foraminifera populations near the shelf break marks the establishment of productive, nutrient-rich, ice-distal conditions at ~20 900 cal a BP; these conditions may also mark the start of favourable conditions for postglacial cold-water coral growth. Postglacial conditions on the inner shelf were not established until <14 500 cal a BP, suggesting glacial conditions west of Ireland may have persisted into the B{\o}lling–Aller{\o}d Interstadial.",

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note = "Funding Information: Grateful thanks to Colm ? Cofaigh for his support during this research, Christian Wilson of Ocean DTM for Olex data-acquisition support, Robin Edwards at Trinity College, Dublin for the use of his MALVERN Mastersizer for grain size analyses and sample processing, and Stephen McCarron at the National University of Ireland, Maynooth, for the use of the GEOTEK multi-sensor core logger. Funding for AMS radiocarbon dates was provided by the International Association of Sedimentologists (Postgraduate Research Grant, 1st session, 2014), the UK Natural Environment Research Council grant; BRITICE-CHRONO NE/J009768/1, and the Raidi? Teilif?s ?ireann (RTE) broadcasting company for the television programme ?The Investigators?. We would like to thank the Captain and Crew of the RV Celtic Explorer, cruise participants and Mr ?odhan Fitzgerald of the Marine Institute, for their invaluable assistance during cruises CE10008 and CE14004 (WICPro). The research surveys were carried out under the Sea Change strategy with the support of the Marine Institute and the Marine Research Sub-programme of the National Development Plan 2007?2013. Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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N2 - Palaeoenvironmental change following deglaciation of the last British–Irish Ice Sheet on the continental shelf west of Ireland was investigated using multiproxy analyses of sediment and foraminifera data from nine sediment cores. Lithofacies associations record various depositional regimes across the shelf, which evolve from subglacial to postglacial conditions. Census data provide the first characterisation of benthic foraminifera populations across the continental shelf and multivariate analyses reveal three distinct biotopes. Biomineralization within these biotopes is restricted to ≤21 200 cal a BP by four radiocarbon ages. The transition from glacial to postglacial benthic foraminifera populations near the shelf break marks the establishment of productive, nutrient-rich, ice-distal conditions at ~20 900 cal a BP; these conditions may also mark the start of favourable conditions for postglacial cold-water coral growth. Postglacial conditions on the inner shelf were not established until <14 500 cal a BP, suggesting glacial conditions west of Ireland may have persisted into the Bølling–Allerød Interstadial.

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ER -

Sedimentary and foraminiferal records of Late Quaternary environmental change west of Ireland and implications for the last British-Irish Ice Sheet

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

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Sedimentology and chronology of the advance and retreat of the last British-Irish Ice Sheet on the continental shelf west of Ireland

Maximum extent and dynamic behaviour of the last British Irish Ice Sheet west of Ireland

Cite this