Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland
A study of proglacial deformation associated with a Late Weichselian glaciomarine sequence was carried out at Melabakkar‐Ásbakkar, west Iceland. At this site, coarse‐grained sediments have been deformed into compressive structures with no associated push moraine morphology. Two large structures were...
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crwiley:10.1111/j.1502-3885.1994.tb00592.x 2024-06-02T08:09:01+00:00 Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland HART, JANE K. 1994 http://dx.doi.org/10.1111/j.1502-3885.1994.tb00592.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1994.tb00592.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1994.tb00592.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 23, issue 2, page 112-121 ISSN 0300-9483 1502-3885 journal-article 1994 crwiley https://doi.org/10.1111/j.1502-3885.1994.tb00592.x 2024-05-03T10:57:30Z A study of proglacial deformation associated with a Late Weichselian glaciomarine sequence was carried out at Melabakkar‐Ásbakkar, west Iceland. At this site, coarse‐grained sediments have been deformed into compressive structures with no associated push moraine morphology. Two large structures were examined, Structure A which consists of large‐scale reverse (and normal) faulting and overturned bedding; and Structure B, which is more complex, with open folding, high‐angle reverse faulting, nappe structures and normal faulting. The structures were interpreted as the result of increasing compressive proglacial deformation, followed by subglacial deformation, which destroyed the surface morphology of the push moraine and incorporated some of the sediments into a subglacial diamicton. The results from this study were compared with other examples of proglacial deformation, and it is suggested that at sites where deformation was restricted to the margin, longitudinal strain was lower than at sites where deformation extended out into the foreland. It is also suggested that if deformation increases downglacier, this is indicative of an overall glacial advance, whilst if the deformation decreases downglacier, this is indicative of a glacial retreat. Article in Journal/Newspaper Iceland Wiley Online Library Melabakkar ENVELOPE(-22.025,-22.025,64.415,64.415) Boreas 23 2 112 121 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A study of proglacial deformation associated with a Late Weichselian glaciomarine sequence was carried out at Melabakkar‐Ásbakkar, west Iceland. At this site, coarse‐grained sediments have been deformed into compressive structures with no associated push moraine morphology. Two large structures were examined, Structure A which consists of large‐scale reverse (and normal) faulting and overturned bedding; and Structure B, which is more complex, with open folding, high‐angle reverse faulting, nappe structures and normal faulting. The structures were interpreted as the result of increasing compressive proglacial deformation, followed by subglacial deformation, which destroyed the surface morphology of the push moraine and incorporated some of the sediments into a subglacial diamicton. The results from this study were compared with other examples of proglacial deformation, and it is suggested that at sites where deformation was restricted to the margin, longitudinal strain was lower than at sites where deformation extended out into the foreland. It is also suggested that if deformation increases downglacier, this is indicative of an overall glacial advance, whilst if the deformation decreases downglacier, this is indicative of a glacial retreat. |
format |
Article in Journal/Newspaper |
author |
HART, JANE K. |
spellingShingle |
HART, JANE K. Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
author_facet |
HART, JANE K. |
author_sort |
HART, JANE K. |
title |
Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
title_short |
Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
title_full |
Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
title_fullStr |
Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
title_full_unstemmed |
Proglacial glaciotectonic deformation at Melabakkar‐Ásbakkar, west Iceland |
title_sort |
proglacial glaciotectonic deformation at melabakkar‐ásbakkar, west iceland |
publisher |
Wiley |
publishDate |
1994 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1994.tb00592.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1994.tb00592.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1994.tb00592.x |
long_lat |
ENVELOPE(-22.025,-22.025,64.415,64.415) |
geographic |
Melabakkar |
geographic_facet |
Melabakkar |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Boreas volume 23, issue 2, page 112-121 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1994.tb00592.x |
container_title |
Boreas |
container_volume |
23 |
container_issue |
2 |
container_start_page |
112 |
op_container_end_page |
121 |
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1800754599290732544 |