Meltwater phenomena in the area between Bala and Corwen, North Wales
Abstract Previously unrecorded glacio‐fluvial phenomena are identified and mapped. These are shown to conform in part with the known southwest to northeast movement of meltwater from the wasting ‘Merioneth’ icecap in late Devensian time. A further series of meltwater channels and associated kames is...
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crwiley:10.1002/gj.3350140112 2024-06-02T08:08:05+00:00 Meltwater phenomena in the area between Bala and Corwen, North Wales Rowlands, B. M. 1979 http://dx.doi.org/10.1002/gj.3350140112 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgj.3350140112 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3350140112 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Geological Journal volume 14, issue 1, page 159-170 ISSN 0072-1050 1099-1034 journal-article 1979 crwiley https://doi.org/10.1002/gj.3350140112 2024-05-03T10:40:22Z Abstract Previously unrecorded glacio‐fluvial phenomena are identified and mapped. These are shown to conform in part with the known southwest to northeast movement of meltwater from the wasting ‘Merioneth’ icecap in late Devensian time. A further series of meltwater channels and associated kames is also revealed, connecting southwards with the Dee Valley. Orientation of bedding within these latter kame deposits at Sarnau (971394) is also shown to accord with deposition by meltwater from an ice front to the southwest. Petrological analysis of igneous erratics within the Sarnau deposits suggests an origin entirely within the Arenig Mountains. It is thus postulated that the features relate to a late stage in the wasting of the ‘Merioneth’ ice cap, when a series of meltwater escape routes to the Dee Valley became progressively ice‐free, and that the newly‐discovered meltwater channel system is thus complementary to previously recorded phenomena. Article in Journal/Newspaper Ice cap Wiley Online Library Bala ENVELOPE(132.817,132.817,67.178,67.178) Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) Geological Journal 14 1 159 170 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Previously unrecorded glacio‐fluvial phenomena are identified and mapped. These are shown to conform in part with the known southwest to northeast movement of meltwater from the wasting ‘Merioneth’ icecap in late Devensian time. A further series of meltwater channels and associated kames is also revealed, connecting southwards with the Dee Valley. Orientation of bedding within these latter kame deposits at Sarnau (971394) is also shown to accord with deposition by meltwater from an ice front to the southwest. Petrological analysis of igneous erratics within the Sarnau deposits suggests an origin entirely within the Arenig Mountains. It is thus postulated that the features relate to a late stage in the wasting of the ‘Merioneth’ ice cap, when a series of meltwater escape routes to the Dee Valley became progressively ice‐free, and that the newly‐discovered meltwater channel system is thus complementary to previously recorded phenomena. |
format |
Article in Journal/Newspaper |
author |
Rowlands, B. M. |
spellingShingle |
Rowlands, B. M. Meltwater phenomena in the area between Bala and Corwen, North Wales |
author_facet |
Rowlands, B. M. |
author_sort |
Rowlands, B. M. |
title |
Meltwater phenomena in the area between Bala and Corwen, North Wales |
title_short |
Meltwater phenomena in the area between Bala and Corwen, North Wales |
title_full |
Meltwater phenomena in the area between Bala and Corwen, North Wales |
title_fullStr |
Meltwater phenomena in the area between Bala and Corwen, North Wales |
title_full_unstemmed |
Meltwater phenomena in the area between Bala and Corwen, North Wales |
title_sort |
meltwater phenomena in the area between bala and corwen, north wales |
publisher |
Wiley |
publishDate |
1979 |
url |
http://dx.doi.org/10.1002/gj.3350140112 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgj.3350140112 https://onlinelibrary.wiley.com/doi/pdf/10.1002/gj.3350140112 |
long_lat |
ENVELOPE(132.817,132.817,67.178,67.178) ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
geographic |
Bala Dee |
geographic_facet |
Bala Dee |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Geological Journal volume 14, issue 1, page 159-170 ISSN 0072-1050 1099-1034 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/gj.3350140112 |
container_title |
Geological Journal |
container_volume |
14 |
container_issue |
1 |
container_start_page |
159 |
op_container_end_page |
170 |
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1800753241676316672 |