An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes
Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and...
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Association française pour l’étude du quaternaire
2013
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Online Access: | https://doi.org/10.4000/quaternaire.6444 http://journals.openedition.org/quaternaire/6444 |
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fttriple:oai:gotriple.eu:10.4000/quaternaire.6444 2023-05-15T16:52:08+02:00 An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry 2013-03-01 https://doi.org/10.4000/quaternaire.6444 http://journals.openedition.org/quaternaire/6444 en eng Association française pour l’étude du quaternaire Quaternaire urn:doi:10.4000/quaternaire.6444 doi:10.4000/quaternaire.6444 http://journals.openedition.org/quaternaire/6444 other Quaternaire cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.4000/quaternaire.6444 2023-01-22T16:55:35Z Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and explained through controlling factors that may act at both regional (e.g. tectonics) and local (topography, lithology, etc.) scales. We compare here the patterns identified in a few mountain ranges of the northern hemisphere, located in various seismotectonic settings (especially western Alps, northwestern Scotland, central Norway, Svalbard and Iceland). By combining our field observations with a literature review, the effectiveness of the paraglacial response on mountain-slope erosion and the contribution of paraglaciation to the sedimentary cascading system are discussed. In most cases, paraglaciation generates sediment storage and aggradation in headwaters and glacial trough, as the evacuation rate into sinks remains low. Finally, paraglaciation appears to be a period of hillslope denudation, preparing reservoirs of sediments, which can only be effectively evacuated during further glaciation periods. Trois décennies après la définition initiale du concept de "paraglaciaire", un modèle général de la paraglaciation a été formalisé, intégrant la cascade sédimentaire paraglaciaire et les types de réponses des réservoirs de sédiments associés. Les écarts à ce modèle doivent maintenant être examinés et expliqués par des facteurs de contrôle agissant aussi bien à l’échelle régionale (tectonique, notamment) que locale (topographie, lithologie, etc.). Nous comparons ici des schémas établis dans quelques massifs montagneux de l'hémisphère nord, localisés dans des contextes séismo-tectoniques variés (notamment Alpes occidentales, nord-ouest de l'Ecosse, Norvège centrale, Svalbard et l'Islande). En combinant nos observations de terrain avec une recension bibliographique, nous discutons de l'efficacité de la réponse paraglaciaire sur ... Article in Journal/Newspaper Iceland Svalbard Unknown Norway Svalbard Quaternaire vol. 24/1 13 24 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants geo envir |
spellingShingle |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants geo envir Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
topic_facet |
cascading system landsliding mountain slopes northern hemisphere paraglaciation sediment fluxes cascade sédimentaire hémisphère nord montagnes mouvement de terrain versants geo envir |
description |
Three decades after the early definition of the "paraglacial" concept, a general model of paraglaciation was established, integrating the typical sediment paraglacial cascading system and the responses of associated sediment storages. The residuals of this model should now be examined and explained through controlling factors that may act at both regional (e.g. tectonics) and local (topography, lithology, etc.) scales. We compare here the patterns identified in a few mountain ranges of the northern hemisphere, located in various seismotectonic settings (especially western Alps, northwestern Scotland, central Norway, Svalbard and Iceland). By combining our field observations with a literature review, the effectiveness of the paraglacial response on mountain-slope erosion and the contribution of paraglaciation to the sedimentary cascading system are discussed. In most cases, paraglaciation generates sediment storage and aggradation in headwaters and glacial trough, as the evacuation rate into sinks remains low. Finally, paraglaciation appears to be a period of hillslope denudation, preparing reservoirs of sediments, which can only be effectively evacuated during further glaciation periods. Trois décennies après la définition initiale du concept de "paraglaciaire", un modèle général de la paraglaciation a été formalisé, intégrant la cascade sédimentaire paraglaciaire et les types de réponses des réservoirs de sédiments associés. Les écarts à ce modèle doivent maintenant être examinés et expliqués par des facteurs de contrôle agissant aussi bien à l’échelle régionale (tectonique, notamment) que locale (topographie, lithologie, etc.). Nous comparons ici des schémas établis dans quelques massifs montagneux de l'hémisphère nord, localisés dans des contextes séismo-tectoniques variés (notamment Alpes occidentales, nord-ouest de l'Ecosse, Norvège centrale, Svalbard et l'Islande). En combinant nos observations de terrain avec une recension bibliographique, nous discutons de l'efficacité de la réponse paraglaciaire sur ... |
format |
Article in Journal/Newspaper |
author |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry |
author_facet |
Cossart, Etienne Mercier, Denis Decaulne, Armelle Feuillet, Thierry |
author_sort |
Cossart, Etienne |
title |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_short |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_full |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_fullStr |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_full_unstemmed |
An overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
title_sort |
overview of the consequences of paraglacial landsliding on deglaciated mountain slopes: typology, timing and contribution to cascading fluxes |
publisher |
Association française pour l’étude du quaternaire |
publishDate |
2013 |
url |
https://doi.org/10.4000/quaternaire.6444 http://journals.openedition.org/quaternaire/6444 |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Iceland Svalbard |
genre_facet |
Iceland Svalbard |
op_source |
Quaternaire |
op_relation |
urn:doi:10.4000/quaternaire.6444 doi:10.4000/quaternaire.6444 http://journals.openedition.org/quaternaire/6444 |
op_rights |
other |
op_doi |
https://doi.org/10.4000/quaternaire.6444 |
container_title |
Quaternaire |
container_issue |
vol. 24/1 |
container_start_page |
13 |
op_container_end_page |
24 |
_version_ |
1766042278912065536 |