Lichenometry in Iceland, results and application
International audience This paper proposes a review of the use of lichenometry in Iceland since 1970, using different techniques to solve the chronology of geomorphic processes. Most users have sought to date proglacial landforms in two main areas: around the southern ice-caps of Vatnajökull and Mýr...
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ftnormandieuniv:oai:HAL:halshs-01391275v1 2024-05-19T07:42:32+00:00 Lichenometry in Iceland, results and application Decaulne, Armelle Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN) 2016 https://shs.hal.science/halshs-01391275 https://doi.org/10.4000/geomorphologie.11291 en eng HAL CCSD Groupe français de géomorphologie (GFG) / Société d'Études pour le Développement Économique et Social (Sedes) info:eu-repo/semantics/altIdentifier/doi/10.4000/geomorphologie.11291 halshs-01391275 https://shs.hal.science/halshs-01391275 doi:10.4000/geomorphologie.11291 ISSN: 1266-5304 EISSN: 1957-777X Géomorphologie : relief, processus, environnement https://shs.hal.science/halshs-01391275 Géomorphologie : relief, processus, environnement, 2016, 22 (1), pp.77-91. ⟨10.4000/geomorphologie.11291⟩ geomorphology [SHS]Humanities and Social Sciences info:eu-repo/semantics/article Journal articles 2016 ftnormandieuniv https://doi.org/10.4000/geomorphologie.11291 2024-04-25T00:27:47Z International audience This paper proposes a review of the use of lichenometry in Iceland since 1970, using different techniques to solve the chronology of geomorphic processes. Most users have sought to date proglacial landforms in two main areas: around the southern ice-caps of Vatnajökull and Mýrdalsjökull and in the Tröllaskagi peninsula in the north. Based on the results of over 35 published studies, lichenometry has been widely applied in Iceland, proposing numerical ages (absolute dating) and relative ages (relative dating) of different surfaces. Increasing awareness of methodological limitations of the technique, together with more sophisticated data processing, has led some authors to claim that lichenometric 'ages' are robust and reliable. However, the different measurement techniques used make it difficult to compare regions or studies in the same area. These problems are exacerbated in Iceland by rapid environmental changes across short distances and more generally by lichen species mis-identification in the field. Moreover, the reliability of lichenometric dates is discredited by their lack of correspondence with tephrochronologic data, whatever the lichenometric method used. Finally, the accuracy of lichenometry quickly weakens after few decades of surface exposure and the method loses rapidly any absolute aptitude. At the end, absolute dates proposed in the literature are not very trustworthy, and lichenometry should be used for relative dating only. Article in Journal/Newspaper Iceland Mýrdalsjökull Vatnajökull Normandie Université: HAL Géomorphologie : relief, processus, environnement 22 1 77 91 |
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Open Polar |
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Normandie Université: HAL |
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ftnormandieuniv |
language |
English |
topic |
geomorphology [SHS]Humanities and Social Sciences |
spellingShingle |
geomorphology [SHS]Humanities and Social Sciences Decaulne, Armelle Lichenometry in Iceland, results and application |
topic_facet |
geomorphology [SHS]Humanities and Social Sciences |
description |
International audience This paper proposes a review of the use of lichenometry in Iceland since 1970, using different techniques to solve the chronology of geomorphic processes. Most users have sought to date proglacial landforms in two main areas: around the southern ice-caps of Vatnajökull and Mýrdalsjökull and in the Tröllaskagi peninsula in the north. Based on the results of over 35 published studies, lichenometry has been widely applied in Iceland, proposing numerical ages (absolute dating) and relative ages (relative dating) of different surfaces. Increasing awareness of methodological limitations of the technique, together with more sophisticated data processing, has led some authors to claim that lichenometric 'ages' are robust and reliable. However, the different measurement techniques used make it difficult to compare regions or studies in the same area. These problems are exacerbated in Iceland by rapid environmental changes across short distances and more generally by lichen species mis-identification in the field. Moreover, the reliability of lichenometric dates is discredited by their lack of correspondence with tephrochronologic data, whatever the lichenometric method used. Finally, the accuracy of lichenometry quickly weakens after few decades of surface exposure and the method loses rapidly any absolute aptitude. At the end, absolute dates proposed in the literature are not very trustworthy, and lichenometry should be used for relative dating only. |
author2 |
Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN) |
format |
Article in Journal/Newspaper |
author |
Decaulne, Armelle |
author_facet |
Decaulne, Armelle |
author_sort |
Decaulne, Armelle |
title |
Lichenometry in Iceland, results and application |
title_short |
Lichenometry in Iceland, results and application |
title_full |
Lichenometry in Iceland, results and application |
title_fullStr |
Lichenometry in Iceland, results and application |
title_full_unstemmed |
Lichenometry in Iceland, results and application |
title_sort |
lichenometry in iceland, results and application |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://shs.hal.science/halshs-01391275 https://doi.org/10.4000/geomorphologie.11291 |
genre |
Iceland Mýrdalsjökull Vatnajökull |
genre_facet |
Iceland Mýrdalsjökull Vatnajökull |
op_source |
ISSN: 1266-5304 EISSN: 1957-777X Géomorphologie : relief, processus, environnement https://shs.hal.science/halshs-01391275 Géomorphologie : relief, processus, environnement, 2016, 22 (1), pp.77-91. ⟨10.4000/geomorphologie.11291⟩ |
op_relation |
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op_doi |
https://doi.org/10.4000/geomorphologie.11291 |
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Géomorphologie : relief, processus, environnement |
container_volume |
22 |
container_issue |
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91 |
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