Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach
ABSTRACT A sediment core from the salt marsh fringing Loch Duart, NW Scotland, UK, containing Lateglacial to Holocene sediments, was analysed using a multi‐element geochemical approach to elucidate the relative sea level (RSL) and palaeoenvironmental changes associated with the deglaciation of the B...
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crwiley:10.1002/jqs.3566 2024-09-15T18:12:28+00:00 Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach Taylor, Jennifer Selby, David Lloyd, Jeremy M. Podrecca, Luca Masterson, Andrew L. Sageman, Bradley B. Szidat, Sönke 2023 http://dx.doi.org/10.1002/jqs.3566 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3566 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of Quaternary Science volume 39, issue 1, page 6-23 ISSN 0267-8179 1099-1417 journal-article 2023 crwiley https://doi.org/10.1002/jqs.3566 2024-09-03T04:23:51Z ABSTRACT A sediment core from the salt marsh fringing Loch Duart, NW Scotland, UK, containing Lateglacial to Holocene sediments, was analysed using a multi‐element geochemical approach to elucidate the relative sea level (RSL) and palaeoenvironmental changes associated with the deglaciation of the British and Irish Ice Sheet. Elemental and isotopic measurements of rhenium, osmium, carbon and nitrogen, X‐ray fluorescence scanning, radiocarbon dating, and foraminiferal analysis produced a suite of data that complements the existing biostratigraphic framework. This suite of bio‐, litho‐ and chemostratigraphic analyses permits discussion of RSL changes that reflect the interplay between post‐glacial eustatic rise and glacio‐isostatic adjustment. The osmium‐isotope ( 187 Os/ 188 Os) data, coupled with a new age–depth model, depict an RSL fall between 16.8 and 14.1 ka cal bp at an average rate of 2 mm a −1 . Falling RSL culminates in basin isolation and is followed by subsequent marine inundation from 11.6 ka cal bp . This RSL record preserves the local interaction between glacial isostatic adjustment and glacio‐eustatic sea‐level change, a relationship that is reflected in the sediment's 187 Os/ 188 Os signature. This is the first known application of the osmium isotope system in an isolation basin that is shown to be a viable proxy for RSL change, a technique that could be applied to glacially influenced isolation basins globally. Article in Journal/Newspaper Ice Sheet Wiley Online Library Journal of Quaternary Science |
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Wiley Online Library |
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English |
description |
ABSTRACT A sediment core from the salt marsh fringing Loch Duart, NW Scotland, UK, containing Lateglacial to Holocene sediments, was analysed using a multi‐element geochemical approach to elucidate the relative sea level (RSL) and palaeoenvironmental changes associated with the deglaciation of the British and Irish Ice Sheet. Elemental and isotopic measurements of rhenium, osmium, carbon and nitrogen, X‐ray fluorescence scanning, radiocarbon dating, and foraminiferal analysis produced a suite of data that complements the existing biostratigraphic framework. This suite of bio‐, litho‐ and chemostratigraphic analyses permits discussion of RSL changes that reflect the interplay between post‐glacial eustatic rise and glacio‐isostatic adjustment. The osmium‐isotope ( 187 Os/ 188 Os) data, coupled with a new age–depth model, depict an RSL fall between 16.8 and 14.1 ka cal bp at an average rate of 2 mm a −1 . Falling RSL culminates in basin isolation and is followed by subsequent marine inundation from 11.6 ka cal bp . This RSL record preserves the local interaction between glacial isostatic adjustment and glacio‐eustatic sea‐level change, a relationship that is reflected in the sediment's 187 Os/ 188 Os signature. This is the first known application of the osmium isotope system in an isolation basin that is shown to be a viable proxy for RSL change, a technique that could be applied to glacially influenced isolation basins globally. |
format |
Article in Journal/Newspaper |
author |
Taylor, Jennifer Selby, David Lloyd, Jeremy M. Podrecca, Luca Masterson, Andrew L. Sageman, Bradley B. Szidat, Sönke |
spellingShingle |
Taylor, Jennifer Selby, David Lloyd, Jeremy M. Podrecca, Luca Masterson, Andrew L. Sageman, Bradley B. Szidat, Sönke Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
author_facet |
Taylor, Jennifer Selby, David Lloyd, Jeremy M. Podrecca, Luca Masterson, Andrew L. Sageman, Bradley B. Szidat, Sönke |
author_sort |
Taylor, Jennifer |
title |
Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
title_short |
Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
title_full |
Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
title_fullStr |
Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
title_full_unstemmed |
Palaeoenvironmental reconstruction of Loch Duart (NW Scotland, UK) since the Last Glacial Maximum: implications from a multiproxy approach |
title_sort |
palaeoenvironmental reconstruction of loch duart (nw scotland, uk) since the last glacial maximum: implications from a multiproxy approach |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/jqs.3566 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3566 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Quaternary Science volume 39, issue 1, page 6-23 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/jqs.3566 |
container_title |
Journal of Quaternary Science |
_version_ |
1810450057554558976 |