Glacier flow at a former ice-divide in SW Scotland
Abstract Late Devensian ice-sheet movement in the western Southern Uplands of Scotland is demonstrated by the distribution of erratics from four different bedrock sources and by glacial striae and ice-moulded landforms. This evidence shows an almost radial movement of ice from an ice-divide zone. Th...
Published in: | Transactions of the Royal Society of Edinburgh: Earth Sciences |
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Language: | English |
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Cambridge University Press (CUP)
1982
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Online Access: | http://dx.doi.org/10.1017/s0263593300003308 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300003308 |
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crcambridgeupr:10.1017/s0263593300003308 2024-09-15T18:12:13+00:00 Glacier flow at a former ice-divide in SW Scotland Cornish, Roger 1982 http://dx.doi.org/10.1017/s0263593300003308 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300003308 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Transactions of the Royal Society of Edinburgh: Earth Sciences volume 73, issue 1, page 31-41 ISSN 0263-5933 1473-7116 journal-article 1982 crcambridgeupr https://doi.org/10.1017/s0263593300003308 2024-07-31T04:04:39Z Abstract Late Devensian ice-sheet movement in the western Southern Uplands of Scotland is demonstrated by the distribution of erratics from four different bedrock sources and by glacial striae and ice-moulded landforms. This evidence shows an almost radial movement of ice from an ice-divide zone. The control of relief over ice flow and the distribution of erratics is emphasised. The distribution of erratics from two of the sources, however, shows that debris in the ice was transported only a very short distance in certain places. Abundant deposits of lodgement till occur in the vicinity of the former ice-divide. Although it is generally considered that glacial erosion, and therefore deposition, are insignificant at the centre of ice-sheets, this study suggests otherwise. It is inferred that till and erratics may be emplaced during ice-sheet build-up when conditions for erosion obtained, these deposits being protected from subsequent removal by the establishment of an ice-divide across the area. The implications for high rates of erosion in ice-sheet source areas are examined. Article in Journal/Newspaper Ice Sheet Cambridge University Press Transactions of the Royal Society of Edinburgh: Earth Sciences 73 1 31 41 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Late Devensian ice-sheet movement in the western Southern Uplands of Scotland is demonstrated by the distribution of erratics from four different bedrock sources and by glacial striae and ice-moulded landforms. This evidence shows an almost radial movement of ice from an ice-divide zone. The control of relief over ice flow and the distribution of erratics is emphasised. The distribution of erratics from two of the sources, however, shows that debris in the ice was transported only a very short distance in certain places. Abundant deposits of lodgement till occur in the vicinity of the former ice-divide. Although it is generally considered that glacial erosion, and therefore deposition, are insignificant at the centre of ice-sheets, this study suggests otherwise. It is inferred that till and erratics may be emplaced during ice-sheet build-up when conditions for erosion obtained, these deposits being protected from subsequent removal by the establishment of an ice-divide across the area. The implications for high rates of erosion in ice-sheet source areas are examined. |
format |
Article in Journal/Newspaper |
author |
Cornish, Roger |
spellingShingle |
Cornish, Roger Glacier flow at a former ice-divide in SW Scotland |
author_facet |
Cornish, Roger |
author_sort |
Cornish, Roger |
title |
Glacier flow at a former ice-divide in SW Scotland |
title_short |
Glacier flow at a former ice-divide in SW Scotland |
title_full |
Glacier flow at a former ice-divide in SW Scotland |
title_fullStr |
Glacier flow at a former ice-divide in SW Scotland |
title_full_unstemmed |
Glacier flow at a former ice-divide in SW Scotland |
title_sort |
glacier flow at a former ice-divide in sw scotland |
publisher |
Cambridge University Press (CUP) |
publishDate |
1982 |
url |
http://dx.doi.org/10.1017/s0263593300003308 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0263593300003308 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Transactions of the Royal Society of Edinburgh: Earth Sciences volume 73, issue 1, page 31-41 ISSN 0263-5933 1473-7116 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0263593300003308 |
container_title |
Transactions of the Royal Society of Edinburgh: Earth Sciences |
container_volume |
73 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
41 |
_version_ |
1810449807178727424 |