Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales
Abstract Recent excavations at Pen‐y‐bryn, Caernarfon have revealed a series of organic deposits below and within a glacial till of Welsh ice provenance. This paper presents the results of 14 C analyses carried out on tree wood and organic peaty muds, together with a description of the site stratigr...
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crwiley:10.1002/gj.3350270208 2024-06-02T08:14:19+00:00 Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales Addison, K. Edge, M. J. 1992 http://dx.doi.org/10.1002/gj.3350270208 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgj.3350270208 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3350270208 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Geological Journal volume 27, issue 2, page 181-190 ISSN 0072-1050 1099-1034 journal-article 1992 crwiley https://doi.org/10.1002/gj.3350270208 2024-05-03T11:16:34Z Abstract Recent excavations at Pen‐y‐bryn, Caernarfon have revealed a series of organic deposits below and within a glacial till of Welsh ice provenance. This paper presents the results of 14 C analyses carried out on tree wood and organic peaty muds, together with a description of the site stratigraphy. Pen‐y‐bryn is the first Welsh site from which in situ biogenic deposits directly enclosed by glacigenic sediments and yielding finite radiocarbon dates have been recovered. Radiocarbon, plant macrofossil, palynological, fossil coleopteran and lithostratigraphic evidence suggest that this is the first site in Wales at which at least one Early Devensian interstadial episode followed by an Early Devensian stadial ice advance may be represented. Snowdonian glacier ice appears to have buried some of the organic deposits beneath till and incorporated other organic material within the till before a later advance of Irish Sea ice. This evidence is used to construct a Devensian chronostratigraphy which may involve two glacial stadia rather than a single Late Devensian glaciation. Article in Journal/Newspaper Sea ice Wiley Online Library Geological Journal 27 2 181 190 |
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Open Polar |
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English |
description |
Abstract Recent excavations at Pen‐y‐bryn, Caernarfon have revealed a series of organic deposits below and within a glacial till of Welsh ice provenance. This paper presents the results of 14 C analyses carried out on tree wood and organic peaty muds, together with a description of the site stratigraphy. Pen‐y‐bryn is the first Welsh site from which in situ biogenic deposits directly enclosed by glacigenic sediments and yielding finite radiocarbon dates have been recovered. Radiocarbon, plant macrofossil, palynological, fossil coleopteran and lithostratigraphic evidence suggest that this is the first site in Wales at which at least one Early Devensian interstadial episode followed by an Early Devensian stadial ice advance may be represented. Snowdonian glacier ice appears to have buried some of the organic deposits beneath till and incorporated other organic material within the till before a later advance of Irish Sea ice. This evidence is used to construct a Devensian chronostratigraphy which may involve two glacial stadia rather than a single Late Devensian glaciation. |
format |
Article in Journal/Newspaper |
author |
Addison, K. Edge, M. J. |
spellingShingle |
Addison, K. Edge, M. J. Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
author_facet |
Addison, K. Edge, M. J. |
author_sort |
Addison, K. |
title |
Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
title_short |
Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
title_full |
Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
title_fullStr |
Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
title_full_unstemmed |
Early Devensian interstadial and glacigenic sediments in Gwynedd, North Wales |
title_sort |
early devensian interstadial and glacigenic sediments in gwynedd, north wales |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1002/gj.3350270208 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgj.3350270208 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3350270208 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Geological Journal volume 27, issue 2, page 181-190 ISSN 0072-1050 1099-1034 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/gj.3350270208 |
container_title |
Geological Journal |
container_volume |
27 |
container_issue |
2 |
container_start_page |
181 |
op_container_end_page |
190 |
_version_ |
1800738113684766720 |