The Late Quaternary sediment successions of Llangorse Lake, south Wales
The last British-Irish Ice Sheet (BIIS) created a landscape with many sedimentary basins that preserve archives of paleoenvironmental and paleoclimatic change during the Last Glacial-Interglacial Transition (LGIT; ~ 18-8 ka BP). The typical lithostratigraphic succession of these archives is composed...
Published in: | Proceedings of the Geologists' Association |
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2021
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5008580 2023-05-15T16:41:24+02:00 The Late Quaternary sediment successions of Llangorse Lake, south Wales Palmer, A. Matthews, I. MacLeod, A. Abrook, A. Akkerman, K. Blockley, S. Candy, I. Francis, C. Hoek, W. Kingston, F. Maas, D. El-Hady, S. Gulliford, R. Lincoln, P. Perez-Fernandez, M. Staff, R. 2021 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580_1/component/file_5008586/5008580.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pgeola.2021.01.004 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580_1/component/file_5008586/5008580.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Proceedings of the Geologists Association info:eu-repo/semantics/article 2021 ftgfzpotsdam https://doi.org/10.1016/j.pgeola.2021.01.004 2022-09-14T05:57:54Z The last British-Irish Ice Sheet (BIIS) created a landscape with many sedimentary basins that preserve archives of paleoenvironmental and paleoclimatic change during the Last Glacial-Interglacial Transition (LGIT; ~ 18-8 ka BP). The typical lithostratigraphic succession of these archives is composed of minerogenic/allogenic sediments formed during cold climatic conditions and organic-rich/authigenic sediments during warmer climates. This paper presents a multi-core lithostratigraphy compiled from the extant lake and surrounding basin at Llangorse Lake, south Wales, a basin lying within the southernmost limits of the last BIIS. This lake contains one of the longest continuous terrestrial sediment successions in the UK. Uncertainty previously existed concerning the presence and distribution of sediments at the site related to the Windermere Interstadial (~ 14.7 to ~ 12.9 ka BP) and Loch Lomond Stadial (~ 12.9 to 11.7 ka BP). A new borehole survey demonstrates that LGIT-age sediments are present at the site with nekron mud (gyttja), corresponding to the Lateglacial Interstadial, deposited in the deeper part of the lake waters and that these deposits are equivalent in age to marl deposits found at shallower depths at the margins of the basin. These deposits are associated with warmer conditions experienced during the Windermere Interstadial and Holocene, whilst minerogenic-rich sediments were deposited during the colder climatic conditions of the Dimlington Stadial and the Loch Lomond Stadial with rangefinder radiocarbon dates confirming this attribution. A model of lake level changes shows that drainage of the Dimlington Stadial glacial lake caused the largest fall, but there was also a further, smaller lake level fall at the end of the Windermere Interstadial and/or the start of the Loch Lomond Stadial, before the level rose in the early Holocene. The lithostratigraphic results presented here form the framework for further paleoenvironmental and paleoclimatic research at Llangorse Lake. Article in Journal/Newspaper Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Llangorse Lake ENVELOPE(-132.970,-132.970,59.370,59.370) Loch Lomond ENVELOPE(-125.746,-125.746,54.239,54.239) Proceedings of the Geologists' Association 132 3 284 296 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
The last British-Irish Ice Sheet (BIIS) created a landscape with many sedimentary basins that preserve archives of paleoenvironmental and paleoclimatic change during the Last Glacial-Interglacial Transition (LGIT; ~ 18-8 ka BP). The typical lithostratigraphic succession of these archives is composed of minerogenic/allogenic sediments formed during cold climatic conditions and organic-rich/authigenic sediments during warmer climates. This paper presents a multi-core lithostratigraphy compiled from the extant lake and surrounding basin at Llangorse Lake, south Wales, a basin lying within the southernmost limits of the last BIIS. This lake contains one of the longest continuous terrestrial sediment successions in the UK. Uncertainty previously existed concerning the presence and distribution of sediments at the site related to the Windermere Interstadial (~ 14.7 to ~ 12.9 ka BP) and Loch Lomond Stadial (~ 12.9 to 11.7 ka BP). A new borehole survey demonstrates that LGIT-age sediments are present at the site with nekron mud (gyttja), corresponding to the Lateglacial Interstadial, deposited in the deeper part of the lake waters and that these deposits are equivalent in age to marl deposits found at shallower depths at the margins of the basin. These deposits are associated with warmer conditions experienced during the Windermere Interstadial and Holocene, whilst minerogenic-rich sediments were deposited during the colder climatic conditions of the Dimlington Stadial and the Loch Lomond Stadial with rangefinder radiocarbon dates confirming this attribution. A model of lake level changes shows that drainage of the Dimlington Stadial glacial lake caused the largest fall, but there was also a further, smaller lake level fall at the end of the Windermere Interstadial and/or the start of the Loch Lomond Stadial, before the level rose in the early Holocene. The lithostratigraphic results presented here form the framework for further paleoenvironmental and paleoclimatic research at Llangorse Lake. |
format |
Article in Journal/Newspaper |
author |
Palmer, A. Matthews, I. MacLeod, A. Abrook, A. Akkerman, K. Blockley, S. Candy, I. Francis, C. Hoek, W. Kingston, F. Maas, D. El-Hady, S. Gulliford, R. Lincoln, P. Perez-Fernandez, M. Staff, R. |
spellingShingle |
Palmer, A. Matthews, I. MacLeod, A. Abrook, A. Akkerman, K. Blockley, S. Candy, I. Francis, C. Hoek, W. Kingston, F. Maas, D. El-Hady, S. Gulliford, R. Lincoln, P. Perez-Fernandez, M. Staff, R. The Late Quaternary sediment successions of Llangorse Lake, south Wales |
author_facet |
Palmer, A. Matthews, I. MacLeod, A. Abrook, A. Akkerman, K. Blockley, S. Candy, I. Francis, C. Hoek, W. Kingston, F. Maas, D. El-Hady, S. Gulliford, R. Lincoln, P. Perez-Fernandez, M. Staff, R. |
author_sort |
Palmer, A. |
title |
The Late Quaternary sediment successions of Llangorse Lake, south Wales |
title_short |
The Late Quaternary sediment successions of Llangorse Lake, south Wales |
title_full |
The Late Quaternary sediment successions of Llangorse Lake, south Wales |
title_fullStr |
The Late Quaternary sediment successions of Llangorse Lake, south Wales |
title_full_unstemmed |
The Late Quaternary sediment successions of Llangorse Lake, south Wales |
title_sort |
late quaternary sediment successions of llangorse lake, south wales |
publishDate |
2021 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580_1/component/file_5008586/5008580.pdf |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-132.970,-132.970,59.370,59.370) ENVELOPE(-125.746,-125.746,54.239,54.239) |
geographic |
Glacial Lake Llangorse Lake Loch Lomond |
geographic_facet |
Glacial Lake Llangorse Lake Loch Lomond |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Proceedings of the Geologists Association |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pgeola.2021.01.004 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008580_1/component/file_5008586/5008580.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.pgeola.2021.01.004 |
container_title |
Proceedings of the Geologists' Association |
container_volume |
132 |
container_issue |
3 |
container_start_page |
284 |
op_container_end_page |
296 |
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1766031824459399168 |