10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland
A well-preserved moraine on the northern coast of County Donegal, Ireland, has played a critical role in our understanding of the glacial history of this sector of the Irish Ice Sheet (IIS). Because of a lack of numerical dating of the moraine, however, previous interpretations of its age and signif...
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ftuglasgow:oai:eprints.gla.ac.uk:5375 2024-06-02T08:08:18+00:00 10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland Clark, J. McCabe, A.M. Schnabel, C. Clark, P.U. Freeman, S.P.H.T. Maden, C. Xu, S. 2009-02 https://eprints.gla.ac.uk/5375/ https://doi.org/10.1111/j.1502-3885.2008.00040.x unknown Wiley Clark, J., McCabe, A.M., Schnabel, C. <http://eprints.gla.ac.uk/view/author/3038.html>, Clark, P.U., Freeman, S.P.H.T. <http://eprints.gla.ac.uk/view/author/12692.html> , Maden, C. and Xu, S. <http://eprints.gla.ac.uk/view/author/12708.html> (2009) 10Be chronology of the last deglaciation of County Donegal, northwestern Ireland. Boreas <https://eprints.gla.ac.uk/view/journal_volume/Boreas.html>, 38(1), pp. 111-118. (doi:10.1111/j.1502-3885.2008.00040.x <https://doi.org/10.1111/j.1502-3885.2008.00040.x>) QE Geology Articles PeerReviewed 2009 ftuglasgow https://doi.org/10.1111/j.1502-3885.2008.00040.x 2024-05-06T15:03:19Z A well-preserved moraine on the northern coast of County Donegal, Ireland, has played a critical role in our understanding of the glacial history of this sector of the Irish Ice Sheet (IIS). Because of a lack of numerical dating of the moraine, however, previous interpretations of its age and significance to the glacial history of this region have varied widely. Here we report eight in situ cosmogenic 10 Be ages on boulders sampled from the moraine. Two of these ages are outliers, with the remaining six ranging from 18.8±1.0 10 Be kyr to 20.9±1.3 10 Be kyr, with an uncertainty-weighted mean age of 19.4±0.3 10 Be kyr (19.4±1.2 kyr accounting for production rate uncertainty). Our results confirm one previous 10Be age obtained from the moraine, with the combined data ( n =7) constraining the age of initial deglaciation of the IIS from its LGM position on the continental shelf to be 19.3±0.3 10 Be kyr (19.3±1.2 kyr accounting for production rate uncertainty). These ages are in excellent agreement with calibrated 14 C ages that constrain retreat of the IIS margin from the continental shelf elsewhere in northwestern and western Ireland and the Irish Sea Basin associated with the start of the Cooley Point Interstadial (≥20–≤18.2 cal. kyr BP), suggesting widespread deglaciation of the IIS ~19.5–20 kyr ago. Article in Journal/Newspaper Ice Sheet University of Glasgow: Enlighten - Publications Boreas 38 1 111 118 |
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Open Polar |
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University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Clark, J. McCabe, A.M. Schnabel, C. Clark, P.U. Freeman, S.P.H.T. Maden, C. Xu, S. 10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
topic_facet |
QE Geology |
description |
A well-preserved moraine on the northern coast of County Donegal, Ireland, has played a critical role in our understanding of the glacial history of this sector of the Irish Ice Sheet (IIS). Because of a lack of numerical dating of the moraine, however, previous interpretations of its age and significance to the glacial history of this region have varied widely. Here we report eight in situ cosmogenic 10 Be ages on boulders sampled from the moraine. Two of these ages are outliers, with the remaining six ranging from 18.8±1.0 10 Be kyr to 20.9±1.3 10 Be kyr, with an uncertainty-weighted mean age of 19.4±0.3 10 Be kyr (19.4±1.2 kyr accounting for production rate uncertainty). Our results confirm one previous 10Be age obtained from the moraine, with the combined data ( n =7) constraining the age of initial deglaciation of the IIS from its LGM position on the continental shelf to be 19.3±0.3 10 Be kyr (19.3±1.2 kyr accounting for production rate uncertainty). These ages are in excellent agreement with calibrated 14 C ages that constrain retreat of the IIS margin from the continental shelf elsewhere in northwestern and western Ireland and the Irish Sea Basin associated with the start of the Cooley Point Interstadial (≥20–≤18.2 cal. kyr BP), suggesting widespread deglaciation of the IIS ~19.5–20 kyr ago. |
format |
Article in Journal/Newspaper |
author |
Clark, J. McCabe, A.M. Schnabel, C. Clark, P.U. Freeman, S.P.H.T. Maden, C. Xu, S. |
author_facet |
Clark, J. McCabe, A.M. Schnabel, C. Clark, P.U. Freeman, S.P.H.T. Maden, C. Xu, S. |
author_sort |
Clark, J. |
title |
10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
title_short |
10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
title_full |
10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
title_fullStr |
10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
title_full_unstemmed |
10 Be chronology of the last deglaciation of County Donegal, northwestern Ireland |
title_sort |
10 be chronology of the last deglaciation of county donegal, northwestern ireland |
publisher |
Wiley |
publishDate |
2009 |
url |
https://eprints.gla.ac.uk/5375/ https://doi.org/10.1111/j.1502-3885.2008.00040.x |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Clark, J., McCabe, A.M., Schnabel, C. <http://eprints.gla.ac.uk/view/author/3038.html>, Clark, P.U., Freeman, S.P.H.T. <http://eprints.gla.ac.uk/view/author/12692.html> , Maden, C. and Xu, S. <http://eprints.gla.ac.uk/view/author/12708.html> (2009) 10Be chronology of the last deglaciation of County Donegal, northwestern Ireland. Boreas <https://eprints.gla.ac.uk/view/journal_volume/Boreas.html>, 38(1), pp. 111-118. (doi:10.1111/j.1502-3885.2008.00040.x <https://doi.org/10.1111/j.1502-3885.2008.00040.x>) |
op_doi |
https://doi.org/10.1111/j.1502-3885.2008.00040.x |
container_title |
Boreas |
container_volume |
38 |
container_issue |
1 |
container_start_page |
111 |
op_container_end_page |
118 |
_version_ |
1800753522665324544 |