Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge
peer reviewed This article summarizes current knowledge about the viviers of the Hautes Fagnes Plateau, Belgium. They are best explained as remnants of isolated, elongate lithalsas and lithalsa plateaus. The ice that constituted them was segregation ice formed not only within the permafrost, but als...
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John Wiley & Sons
2000
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Online Access: | https://orbi.uliege.be/handle/2268/250185 https://orbi.uliege.be/bitstream/2268/250185/1/REMNANTS%20OF%20LITHALSAS%20OF%20THE%20HAUTES%20FAGNES%2c%20BELGIUMppa.pdf https://doi.org/10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q |
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ftorbi:oai:orbi.ulg.ac.be:2268/250185 2024-04-21T08:04:30+00:00 Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge Pissart, Albert 2000 https://orbi.uliege.be/handle/2268/250185 https://orbi.uliege.be/bitstream/2268/250185/1/REMNANTS%20OF%20LITHALSAS%20OF%20THE%20HAUTES%20FAGNES%2c%20BELGIUMppa.pdf https://doi.org/10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q en eng John Wiley & Sons urn:issn:1045-6740 urn:issn:1099-1530 https://orbi.uliege.be/handle/2268/250185 info:hdl:2268/250185 https://orbi.uliege.be/bitstream/2268/250185/1/REMNANTS%20OF%20LITHALSAS%20OF%20THE%20HAUTES%20FAGNES%2c%20BELGIUMppa.pdf doi:10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q scopus-id:2-s2.0-0034455692 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Permafrost and Periglacial Processes, 11 (4), 327-355 (2000) Lithalsas Mineral palsa Palacoclimate Pingos Younger dryas Belgium Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2000 ftorbi https://doi.org/10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q 2024-03-27T14:54:20Z peer reviewed This article summarizes current knowledge about the viviers of the Hautes Fagnes Plateau, Belgium. They are best explained as remnants of isolated, elongate lithalsas and lithalsa plateaus. The ice that constituted them was segregation ice formed not only within the permafrost, but also above it (aggradational ice). The lithalsas formed in discontinuous permafrost. The lack of peat during growth implies an annual average temperature of -5 to -6°C in accordance with a model by Seppälä. Data are summarized from nine cuttings made through vivier ramparts. The stratigraphic evidence, including 14C and the study of volcanic dust and pollen, indicates that these periglacial mounds formed during the Younger Dryas. Forms identical with the viviers of the Hautes Fagnes have been observed in northern subarctic Québec, Canada. They result from melting of lithalsas which exist in this area, where summers are cool and permafrost is discontinuous (annual average temperature between -4 and -6°C; temperature of the warmest month between +9 and +11.5°C). Because such conditions exist in few regions, lithalsas are rare nowadays and are only known in northern Québec and Lapland. Traces of lithalsas that appeared during the Younger Dryas are known only from Ireland, Wales and the Hautes Fagnes. Similar but older forms exist in eastern England and some Holocene forms exist in Lapland. The distribution of the features that appeared during the Younger Dryas fits with the palaeoclimatical reconstruction of Isarin. This permits one to understand why these forms exist only in the British Isles and the Belgian Ardennes, but nowhere else. Article in Journal/Newspaper Ice palsa Peat permafrost Permafrost and Periglacial Processes Subarctic Lapland University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Lithalsas Mineral palsa Palacoclimate Pingos Younger dryas Belgium Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Lithalsas Mineral palsa Palacoclimate Pingos Younger dryas Belgium Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Pissart, Albert Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
topic_facet |
Lithalsas Mineral palsa Palacoclimate Pingos Younger dryas Belgium Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed This article summarizes current knowledge about the viviers of the Hautes Fagnes Plateau, Belgium. They are best explained as remnants of isolated, elongate lithalsas and lithalsa plateaus. The ice that constituted them was segregation ice formed not only within the permafrost, but also above it (aggradational ice). The lithalsas formed in discontinuous permafrost. The lack of peat during growth implies an annual average temperature of -5 to -6°C in accordance with a model by Seppälä. Data are summarized from nine cuttings made through vivier ramparts. The stratigraphic evidence, including 14C and the study of volcanic dust and pollen, indicates that these periglacial mounds formed during the Younger Dryas. Forms identical with the viviers of the Hautes Fagnes have been observed in northern subarctic Québec, Canada. They result from melting of lithalsas which exist in this area, where summers are cool and permafrost is discontinuous (annual average temperature between -4 and -6°C; temperature of the warmest month between +9 and +11.5°C). Because such conditions exist in few regions, lithalsas are rare nowadays and are only known in northern Québec and Lapland. Traces of lithalsas that appeared during the Younger Dryas are known only from Ireland, Wales and the Hautes Fagnes. Similar but older forms exist in eastern England and some Holocene forms exist in Lapland. The distribution of the features that appeared during the Younger Dryas fits with the palaeoclimatical reconstruction of Isarin. This permits one to understand why these forms exist only in the British Isles and the Belgian Ardennes, but nowhere else. |
format |
Article in Journal/Newspaper |
author |
Pissart, Albert |
author_facet |
Pissart, Albert |
author_sort |
Pissart, Albert |
title |
Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
title_short |
Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
title_full |
Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
title_fullStr |
Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
title_full_unstemmed |
Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge |
title_sort |
remnants of lithalsas of the hautes fagnes, belgium: a summary of present-day knowledge |
publisher |
John Wiley & Sons |
publishDate |
2000 |
url |
https://orbi.uliege.be/handle/2268/250185 https://orbi.uliege.be/bitstream/2268/250185/1/REMNANTS%20OF%20LITHALSAS%20OF%20THE%20HAUTES%20FAGNES%2c%20BELGIUMppa.pdf https://doi.org/10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q |
genre |
Ice palsa Peat permafrost Permafrost and Periglacial Processes Subarctic Lapland |
genre_facet |
Ice palsa Peat permafrost Permafrost and Periglacial Processes Subarctic Lapland |
op_source |
Permafrost and Periglacial Processes, 11 (4), 327-355 (2000) |
op_relation |
urn:issn:1045-6740 urn:issn:1099-1530 https://orbi.uliege.be/handle/2268/250185 info:hdl:2268/250185 https://orbi.uliege.be/bitstream/2268/250185/1/REMNANTS%20OF%20LITHALSAS%20OF%20THE%20HAUTES%20FAGNES%2c%20BELGIUMppa.pdf doi:10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q scopus-id:2-s2.0-0034455692 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/1099-1530(200012)11:4<327::AID-PPP370>3.0.CO;2-Q |
_version_ |
1796944080449568768 |