The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope
The Höfðahólar rock avalanche, in the Skagafjörður area of northern Iceland, was investigated on the basis of a geomorphological analysis of its landforms and close surrounding environment. Thanks to sound chronological constraints ( 14 C dating from birch remnants in peat areas that developed withi...
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crsagepubl:10.1177/0959683612463104 2024-04-28T08:25:40+00:00 The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope Mercier, Denis Cossart, Etienne Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn 2012 http://dx.doi.org/10.1177/0959683612463104 http://journals.sagepub.com/doi/pdf/10.1177/0959683612463104 http://journals.sagepub.com/doi/full-xml/10.1177/0959683612463104 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 23, issue 3, page 432-446 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2012 crsagepubl https://doi.org/10.1177/0959683612463104 2024-04-09T08:02:59Z The Höfðahólar rock avalanche, in the Skagafjörður area of northern Iceland, was investigated on the basis of a geomorphological analysis of its landforms and close surrounding environment. Thanks to sound chronological constraints ( 14 C dating from birch remnants in peat areas that developed within depressions over the chaotic rock-avalanche deposit, tephrochronological sequences resulting from subsequent ash fallouts over the deposit, calibration of an age–depth model of peats and previously dated raised beaches), we define the rock-avalanche implementation with a wider timeframe between 10,200 and 7975 cal. yr BP and with a narrower frame between 9000 and 8195 ± 45 cal. yr BP. Such a well constrained timing proposes one of the most precise datings of an early-Holocene major slope failure in Iceland. This result fits well in the known chronology of the deglaciation in this area and in the prevailing Icelandic theory of a generalized phase of landsliding that occurred shortly after the deglaciation of the area. The main driver for the rock-avalanche occurrence is associated to a paraglacial origin; glacio-isostatic rebound, associated to rockwall debuttressing, is thought to be the main factor in the genesis of this Boreal major disequilibrium. Article in Journal/Newspaper Iceland SAGE Publications The Holocene 23 3 432 446 |
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Open Polar |
collection |
SAGE Publications |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Mercier, Denis Cossart, Etienne Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
The Höfðahólar rock avalanche, in the Skagafjörður area of northern Iceland, was investigated on the basis of a geomorphological analysis of its landforms and close surrounding environment. Thanks to sound chronological constraints ( 14 C dating from birch remnants in peat areas that developed within depressions over the chaotic rock-avalanche deposit, tephrochronological sequences resulting from subsequent ash fallouts over the deposit, calibration of an age–depth model of peats and previously dated raised beaches), we define the rock-avalanche implementation with a wider timeframe between 10,200 and 7975 cal. yr BP and with a narrower frame between 9000 and 8195 ± 45 cal. yr BP. Such a well constrained timing proposes one of the most precise datings of an early-Holocene major slope failure in Iceland. This result fits well in the known chronology of the deglaciation in this area and in the prevailing Icelandic theory of a generalized phase of landsliding that occurred shortly after the deglaciation of the area. The main driver for the rock-avalanche occurrence is associated to a paraglacial origin; glacio-isostatic rebound, associated to rockwall debuttressing, is thought to be the main factor in the genesis of this Boreal major disequilibrium. |
format |
Article in Journal/Newspaper |
author |
Mercier, Denis Cossart, Etienne Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn |
author_facet |
Mercier, Denis Cossart, Etienne Decaulne, Armelle Feuillet, Thierry Jónsson, Helgi Páll Sæmundsson, Þorsteinn |
author_sort |
Mercier, Denis |
title |
The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
title_short |
The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
title_full |
The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
title_fullStr |
The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
title_full_unstemmed |
The Höfðahólar rock avalanche (sturzström): Chronological constraint of paraglacial landsliding on an Icelandic hillslope |
title_sort |
höfðahólar rock avalanche (sturzström): chronological constraint of paraglacial landsliding on an icelandic hillslope |
publisher |
SAGE Publications |
publishDate |
2012 |
url |
http://dx.doi.org/10.1177/0959683612463104 http://journals.sagepub.com/doi/pdf/10.1177/0959683612463104 http://journals.sagepub.com/doi/full-xml/10.1177/0959683612463104 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
The Holocene volume 23, issue 3, page 432-446 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683612463104 |
container_title |
The Holocene |
container_volume |
23 |
container_issue |
3 |
container_start_page |
432 |
op_container_end_page |
446 |
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1797585402445430784 |