Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform
Abstract This paper presents data on a glacial landform that, to our knowledge, has not previously been described in the literature: the ice‐cored drumlin. The study area is the forefield of the surge‐type glacier Brúarjökull at the northeastern margin of the Vatnajökull ice cap, East Iceland. Based...
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crwiley:10.1002/jqs.949 2024-09-09T19:41:28+00:00 Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform Schomacker, Anders Krüger, Johannes Kjær, Kurt H. 2005 http://dx.doi.org/10.1002/jqs.949 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.949 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.949 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 21, issue 1, page 85-93 ISSN 0267-8179 1099-1417 journal-article 2005 crwiley https://doi.org/10.1002/jqs.949 2024-06-18T04:13:04Z Abstract This paper presents data on a glacial landform that, to our knowledge, has not previously been described in the literature: the ice‐cored drumlin. The study area is the forefield of the surge‐type glacier Brúarjökull at the northeastern margin of the Vatnajökull ice cap, East Iceland. Based on sedimentological field investigations and aerial photograph interpretation, a qualitative model for the formation of ice‐cored drumlins is proposed. The drumlin core consists of stagnant glacier ice from a previous advance and bubbly ice formed by snowdrifts, which were incorporated during the most recent advance—the 1963–64 surge. This advance deposited a mantle of basal till and streamlined the ice‐cored moraines. Till deformation and deposition on the drumlin ice‐core is facilitated by a substratum of low‐permeability ice‐cored moraines. In the present climate, the ice‐core is subject to melting and the drumlin landform will degrade. The ongoing melting of the core and re‐sedimentation of the till cover cause the originally streamlined subglacial landform to develop into a patch of hummocky moraine surrounded by a basal till sheet. Thus, ice‐cored drumlins are a transitional‐state landform in the surging glacier landsystem at Brúarjökull rather than a ‘final’ landform. Copyright © 2005 John Wiley & Sons, Ltd. Article in Journal/Newspaper glacier Ice cap ice core Iceland Vatnajökull Wiley Online Library Brúarjökull ENVELOPE(-16.157,-16.157,64.682,64.682) Stagnant Glacier ENVELOPE(-125.053,-125.053,57.866,57.866) Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Journal of Quaternary Science 21 1 85 93 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract This paper presents data on a glacial landform that, to our knowledge, has not previously been described in the literature: the ice‐cored drumlin. The study area is the forefield of the surge‐type glacier Brúarjökull at the northeastern margin of the Vatnajökull ice cap, East Iceland. Based on sedimentological field investigations and aerial photograph interpretation, a qualitative model for the formation of ice‐cored drumlins is proposed. The drumlin core consists of stagnant glacier ice from a previous advance and bubbly ice formed by snowdrifts, which were incorporated during the most recent advance—the 1963–64 surge. This advance deposited a mantle of basal till and streamlined the ice‐cored moraines. Till deformation and deposition on the drumlin ice‐core is facilitated by a substratum of low‐permeability ice‐cored moraines. In the present climate, the ice‐core is subject to melting and the drumlin landform will degrade. The ongoing melting of the core and re‐sedimentation of the till cover cause the originally streamlined subglacial landform to develop into a patch of hummocky moraine surrounded by a basal till sheet. Thus, ice‐cored drumlins are a transitional‐state landform in the surging glacier landsystem at Brúarjökull rather than a ‘final’ landform. Copyright © 2005 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Schomacker, Anders Krüger, Johannes Kjær, Kurt H. |
spellingShingle |
Schomacker, Anders Krüger, Johannes Kjær, Kurt H. Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
author_facet |
Schomacker, Anders Krüger, Johannes Kjær, Kurt H. |
author_sort |
Schomacker, Anders |
title |
Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
title_short |
Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
title_full |
Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
title_fullStr |
Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
title_full_unstemmed |
Ice‐cored drumlins at the surge‐type glacier Brúarjökull, Iceland: a transitional‐state landform |
title_sort |
ice‐cored drumlins at the surge‐type glacier brúarjökull, iceland: a transitional‐state landform |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1002/jqs.949 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.949 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.949 |
long_lat |
ENVELOPE(-16.157,-16.157,64.682,64.682) ENVELOPE(-125.053,-125.053,57.866,57.866) ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Brúarjökull Stagnant Glacier Vatnajökull |
geographic_facet |
Brúarjökull Stagnant Glacier Vatnajökull |
genre |
glacier Ice cap ice core Iceland Vatnajökull |
genre_facet |
glacier Ice cap ice core Iceland Vatnajökull |
op_source |
Journal of Quaternary Science volume 21, issue 1, page 85-93 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.949 |
container_title |
Journal of Quaternary Science |
container_volume |
21 |
container_issue |
1 |
container_start_page |
85 |
op_container_end_page |
93 |
_version_ |
1809910857212100608 |