Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers
Abstract Three outlet glaciers of the highland ice of Ny Friesland are described, in which englacial debris, derived from the glacier bed, occurs in thick bands which dip steeply up-glacier. As the glacier wastes down this debris is released on the surface to form thick supraglacial tills, which may...
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Language: | English |
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Cambridge University Press (CUP)
1968
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Online Access: | http://dx.doi.org/10.1017/s0022143000020608 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020608 |
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crcambridgeupr:10.1017/s0022143000020608 2024-04-28T08:26:46+00:00 Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers Boulton, G. S. 1968 http://dx.doi.org/10.1017/s0022143000020608 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020608 en eng Cambridge University Press (CUP) Journal of Glaciology volume 7, issue 51, page 391-412 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1968 crcambridgeupr https://doi.org/10.1017/s0022143000020608 2024-04-09T06:55:31Z Abstract Three outlet glaciers of the highland ice of Ny Friesland are described, in which englacial debris, derived from the glacier bed, occurs in thick bands which dip steeply up-glacier. As the glacier wastes down this debris is released on the surface to form thick supraglacial tills, which may remain on the glacier surface, or flow down it and onto bedded deposits which fringe the glacier in the proglacial zone. A frequent result of this latter process is the production of multi-till sequences which result from a single glacier retreat phase rather than multiple advance and retreat. The sedimentological features and fabrics of englacial debris bands and flow tills are described, and a mechanism for the formation of “controlled” and “uncontrolled” hummocky moraine is suggested. Many flow tills are identical to the compact fine-grained tills common in lowland glacial deposits of Pleistocene age in Europe and North America, and it is suggested that some of the latter could be flow tills. Article in Journal/Newspaper Journal of Glaciology Ny Friesland Cambridge University Press Journal of Glaciology 7 51 391 412 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Boulton, G. S. Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
topic_facet |
Earth-Surface Processes |
description |
Abstract Three outlet glaciers of the highland ice of Ny Friesland are described, in which englacial debris, derived from the glacier bed, occurs in thick bands which dip steeply up-glacier. As the glacier wastes down this debris is released on the surface to form thick supraglacial tills, which may remain on the glacier surface, or flow down it and onto bedded deposits which fringe the glacier in the proglacial zone. A frequent result of this latter process is the production of multi-till sequences which result from a single glacier retreat phase rather than multiple advance and retreat. The sedimentological features and fabrics of englacial debris bands and flow tills are described, and a mechanism for the formation of “controlled” and “uncontrolled” hummocky moraine is suggested. Many flow tills are identical to the compact fine-grained tills common in lowland glacial deposits of Pleistocene age in Europe and North America, and it is suggested that some of the latter could be flow tills. |
format |
Article in Journal/Newspaper |
author |
Boulton, G. S. |
author_facet |
Boulton, G. S. |
author_sort |
Boulton, G. S. |
title |
Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
title_short |
Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
title_full |
Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
title_fullStr |
Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
title_full_unstemmed |
Flow Tills and Related Deposits on Some Vestspitsbergen Glaciers |
title_sort |
flow tills and related deposits on some vestspitsbergen glaciers |
publisher |
Cambridge University Press (CUP) |
publishDate |
1968 |
url |
http://dx.doi.org/10.1017/s0022143000020608 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000020608 |
genre |
Journal of Glaciology Ny Friesland |
genre_facet |
Journal of Glaciology Ny Friesland |
op_source |
Journal of Glaciology volume 7, issue 51, page 391-412 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000020608 |
container_title |
Journal of Glaciology |
container_volume |
7 |
container_issue |
51 |
container_start_page |
391 |
op_container_end_page |
412 |
_version_ |
1797586017889288192 |