Two glacial mound fields in northern Savo Finland
Two mound fields in central Finland contain numbers of large glacial drift mounds, circular in plan and conical in profile. Those belonging to the first field, which are composed mainly of stratified glaciofluvial material with layers of flow till, are interpreted as kames. Those of the second field...
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Geographical Society of Finland
1975
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fttsvojs:oai:journal.fi:article/9233 2023-05-15T16:41:00+02:00 Two glacial mound fields in northern Savo Finland Aartolahti, Toive 1975-01-01 https://fennia.journal.fi/article/view/9233 en eng Geographical Society of Finland https://fennia.journal.fi/article/view/9233 Copyright (c) 2014 Fennia Fennia; Vol 139 Nro 1 (1975) Fennia - International Journal of Geography; Vol 139 No 1 (1975) 1798-5617 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 1975 fttsvojs 2020-09-30T22:46:18Z Two mound fields in central Finland contain numbers of large glacial drift mounds, circular in plan and conical in profile. Those belonging to the first field, which are composed mainly of stratified glaciofluvial material with layers of flow till, are interpreted as kames. Those of the second field are chiefly till but also contain some layers of fine glaciofluvial material. Some of these are explained as being thermokarst features formed by supraglacial material accumulating in sinkholes in the stagnant ice, and some as dead‑ice hummocky moraines and crevasse fillings. The structural and morphological features suggest that the till and glaciofluvial material were deposited in the same environment. The large quantities of supraglacial ablation till and flow till are of importance in the processes of deposition in both mound fields. The differences between the fields in the structure and morphology of the mounds are attributed to differences in location with respect to the level of the highest shore‑line and the resulting differences in conditions of deposition. Both fields are situated in a zone where a large amount of consistently fine supraglacial material accumulated as a result of a local retardation in the retreat of the ice sheet. Article in Journal/Newspaper Ice Sheet Thermokarst Federation of Finnish Learned Societies: Scientific Journals Online |
institution |
Open Polar |
collection |
Federation of Finnish Learned Societies: Scientific Journals Online |
op_collection_id |
fttsvojs |
language |
English |
description |
Two mound fields in central Finland contain numbers of large glacial drift mounds, circular in plan and conical in profile. Those belonging to the first field, which are composed mainly of stratified glaciofluvial material with layers of flow till, are interpreted as kames. Those of the second field are chiefly till but also contain some layers of fine glaciofluvial material. Some of these are explained as being thermokarst features formed by supraglacial material accumulating in sinkholes in the stagnant ice, and some as dead‑ice hummocky moraines and crevasse fillings. The structural and morphological features suggest that the till and glaciofluvial material were deposited in the same environment. The large quantities of supraglacial ablation till and flow till are of importance in the processes of deposition in both mound fields. The differences between the fields in the structure and morphology of the mounds are attributed to differences in location with respect to the level of the highest shore‑line and the resulting differences in conditions of deposition. Both fields are situated in a zone where a large amount of consistently fine supraglacial material accumulated as a result of a local retardation in the retreat of the ice sheet. |
format |
Article in Journal/Newspaper |
author |
Aartolahti, Toive |
spellingShingle |
Aartolahti, Toive Two glacial mound fields in northern Savo Finland |
author_facet |
Aartolahti, Toive |
author_sort |
Aartolahti, Toive |
title |
Two glacial mound fields in northern Savo Finland |
title_short |
Two glacial mound fields in northern Savo Finland |
title_full |
Two glacial mound fields in northern Savo Finland |
title_fullStr |
Two glacial mound fields in northern Savo Finland |
title_full_unstemmed |
Two glacial mound fields in northern Savo Finland |
title_sort |
two glacial mound fields in northern savo finland |
publisher |
Geographical Society of Finland |
publishDate |
1975 |
url |
https://fennia.journal.fi/article/view/9233 |
genre |
Ice Sheet Thermokarst |
genre_facet |
Ice Sheet Thermokarst |
op_source |
Fennia; Vol 139 Nro 1 (1975) Fennia - International Journal of Geography; Vol 139 No 1 (1975) 1798-5617 |
op_relation |
https://fennia.journal.fi/article/view/9233 |
op_rights |
Copyright (c) 2014 Fennia |
_version_ |
1766031441407246336 |