Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland
Abstract In the foreland of the Vestari-Hagafellsjökull glacier, Langajökull, central Iceland, three scales of subglacial bed forms are found: drumlins, flutes and lineations. The smaller bed forms are superimposed upon the larger. These three bed forms probably formed as a result of the presence of...
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Language: | English |
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000034912 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034912 |
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crcambridgeupr:10.1017/s0022143000034912 2024-05-19T07:40:45+00:00 Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland Hart, Jane K. 1995 http://dx.doi.org/10.1017/s0022143000034912 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034912 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 139, page 596-606 ISSN 0022-1430 1727-5652 journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000034912 2024-05-02T06:50:51Z Abstract In the foreland of the Vestari-Hagafellsjökull glacier, Langajökull, central Iceland, three scales of subglacial bed forms are found: drumlins, flutes and lineations. The smaller bed forms are superimposed upon the larger. These three bed forms probably formed as a result of the presence of a rigid suhglacial core producing a lee-side low-pressure area into which sediment flowed and collected. The cores of the drumlins are tumuli (lava blisters), whilst the cores of the flutes and lineations were large clasts. Differences between the three scales of bed forms are that: (a) the flutes and lineations are far more mobile features as their cores could move within the deforming layer, whilst the drumlin bedrock cores were fixed; (b) the lineations formed in association with a clast pavement. The change in scale of the bed forms may he related to changes in thickness of the deforming layer and size of the core. At this site, smaller bed forms were superimposed upon larger bed forms and these may have formed as the deforming layer progressively thinned in association with glacial retreat. Article in Journal/Newspaper glacier Iceland Journal of Glaciology Cambridge University Press Journal of Glaciology 41 139 596 606 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract In the foreland of the Vestari-Hagafellsjökull glacier, Langajökull, central Iceland, three scales of subglacial bed forms are found: drumlins, flutes and lineations. The smaller bed forms are superimposed upon the larger. These three bed forms probably formed as a result of the presence of a rigid suhglacial core producing a lee-side low-pressure area into which sediment flowed and collected. The cores of the drumlins are tumuli (lava blisters), whilst the cores of the flutes and lineations were large clasts. Differences between the three scales of bed forms are that: (a) the flutes and lineations are far more mobile features as their cores could move within the deforming layer, whilst the drumlin bedrock cores were fixed; (b) the lineations formed in association with a clast pavement. The change in scale of the bed forms may he related to changes in thickness of the deforming layer and size of the core. At this site, smaller bed forms were superimposed upon larger bed forms and these may have formed as the deforming layer progressively thinned in association with glacial retreat. |
format |
Article in Journal/Newspaper |
author |
Hart, Jane K. |
spellingShingle |
Hart, Jane K. Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
author_facet |
Hart, Jane K. |
author_sort |
Hart, Jane K. |
title |
Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
title_short |
Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
title_full |
Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
title_fullStr |
Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
title_full_unstemmed |
Recent drumlins, flutes and lineations at Vestari-Hagafellsjökull, Iceland |
title_sort |
recent drumlins, flutes and lineations at vestari-hagafellsjökull, iceland |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000034912 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034912 |
genre |
glacier Iceland Journal of Glaciology |
genre_facet |
glacier Iceland Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 139, page 596-606 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000034912 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
139 |
container_start_page |
596 |
op_container_end_page |
606 |
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1799480328215068672 |