Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland
Fláajökull is a non-surging outlet glacier draining the south-eastern part of the Vatnajökull, southeast Iceland. Fláajökull was stationary or advanced slightly between 1966 and 1995 and formed a prominent end moraine. Glacial retreat since then has revealed a cluster of 15 drumlins. This study focu...
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Cambridge University Press
2016
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Online Access: | https://doi.org/10.1017/aog.2016.4 https://doaj.org/article/3f85d1b2ea934ef799d54c45f92d205d |
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ftdoajarticles:oai:doaj.org/article:3f85d1b2ea934ef799d54c45f92d205d 2023-05-15T13:29:36+02:00 Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland Sverrir Aðalsteinn Jónsson Ívar Örn Benediktsson Ólafur Ingólfsson Anders Schomacker Helga Lucia Bergsdóttir William R. Jacobson Hans Linderson 2016-07-01T00:00:00Z https://doi.org/10.1017/aog.2016.4 https://doaj.org/article/3f85d1b2ea934ef799d54c45f92d205d EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305516000045/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.4 0260-3055 1727-5644 https://doaj.org/article/3f85d1b2ea934ef799d54c45f92d205d Annals of Glaciology, Vol 57, Pp 128-141 (2016) drumlins glacial geology glacial geomorphology glacial sedimentology glacial tills Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.1017/aog.2016.4 2023-03-12T01:31:57Z Fláajökull is a non-surging outlet glacier draining the south-eastern part of the Vatnajökull, southeast Iceland. Fláajökull was stationary or advanced slightly between 1966 and 1995 and formed a prominent end moraine. Glacial retreat since then has revealed a cluster of 15 drumlins. This study focuses on the morphology and sedimentology of the drumlins. They are 100–600 m long, 40–130 m wide, and have cores of glaciofluvial sediment or till. The drumlins are draped by ~1 m thick, massive subglacial traction till. The glacier forefield is characterized by a number of arcuate and saw-tooth, terminal and recessional moraine ridges, overridden moraines with fluted surfaces, and glaciofluvial outwash. Some of the drumlins extend towards the 1995 end moraine but terminate abruptly at the moraine and are not observed in front of it. This suggests that they were formed sub-marginally during the 1966–1995 terminal position. The sedimentary structure of the drumlins is best explained by the sticky spot model. Dating and dendrochronological analyses of birch logs found on the surface of one of the drumlins indicate that the valley was forested about 2100 calendar year BP, after which the glacier started to reform, possibly due to an abrupt change in climate. Article in Journal/Newspaper Annals of Glaciology glacier Iceland Vatnajökull Directory of Open Access Journals: DOAJ Articles Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Fláajökull ENVELOPE(-15.651,-15.651,64.365,64.365) Annals of Glaciology 57 72 128 141 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
drumlins glacial geology glacial geomorphology glacial sedimentology glacial tills Meteorology. Climatology QC851-999 |
spellingShingle |
drumlins glacial geology glacial geomorphology glacial sedimentology glacial tills Meteorology. Climatology QC851-999 Sverrir Aðalsteinn Jónsson Ívar Örn Benediktsson Ólafur Ingólfsson Anders Schomacker Helga Lucia Bergsdóttir William R. Jacobson Hans Linderson Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
topic_facet |
drumlins glacial geology glacial geomorphology glacial sedimentology glacial tills Meteorology. Climatology QC851-999 |
description |
Fláajökull is a non-surging outlet glacier draining the south-eastern part of the Vatnajökull, southeast Iceland. Fláajökull was stationary or advanced slightly between 1966 and 1995 and formed a prominent end moraine. Glacial retreat since then has revealed a cluster of 15 drumlins. This study focuses on the morphology and sedimentology of the drumlins. They are 100–600 m long, 40–130 m wide, and have cores of glaciofluvial sediment or till. The drumlins are draped by ~1 m thick, massive subglacial traction till. The glacier forefield is characterized by a number of arcuate and saw-tooth, terminal and recessional moraine ridges, overridden moraines with fluted surfaces, and glaciofluvial outwash. Some of the drumlins extend towards the 1995 end moraine but terminate abruptly at the moraine and are not observed in front of it. This suggests that they were formed sub-marginally during the 1966–1995 terminal position. The sedimentary structure of the drumlins is best explained by the sticky spot model. Dating and dendrochronological analyses of birch logs found on the surface of one of the drumlins indicate that the valley was forested about 2100 calendar year BP, after which the glacier started to reform, possibly due to an abrupt change in climate. |
format |
Article in Journal/Newspaper |
author |
Sverrir Aðalsteinn Jónsson Ívar Örn Benediktsson Ólafur Ingólfsson Anders Schomacker Helga Lucia Bergsdóttir William R. Jacobson Hans Linderson |
author_facet |
Sverrir Aðalsteinn Jónsson Ívar Örn Benediktsson Ólafur Ingólfsson Anders Schomacker Helga Lucia Bergsdóttir William R. Jacobson Hans Linderson |
author_sort |
Sverrir Aðalsteinn Jónsson |
title |
Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
title_short |
Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
title_full |
Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
title_fullStr |
Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
title_full_unstemmed |
Submarginal drumlin formation and late Holocene history of Fláajökull, southeast Iceland |
title_sort |
submarginal drumlin formation and late holocene history of fláajökull, southeast iceland |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://doi.org/10.1017/aog.2016.4 https://doaj.org/article/3f85d1b2ea934ef799d54c45f92d205d |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) ENVELOPE(-15.651,-15.651,64.365,64.365) |
geographic |
Vatnajökull Fláajökull |
geographic_facet |
Vatnajökull Fláajökull |
genre |
Annals of Glaciology glacier Iceland Vatnajökull |
genre_facet |
Annals of Glaciology glacier Iceland Vatnajökull |
op_source |
Annals of Glaciology, Vol 57, Pp 128-141 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305516000045/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.4 0260-3055 1727-5644 https://doaj.org/article/3f85d1b2ea934ef799d54c45f92d205d |
op_doi |
https://doi.org/10.1017/aog.2016.4 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
72 |
container_start_page |
128 |
op_container_end_page |
141 |
_version_ |
1766001457459363840 |