Transformation of landforms and sediments in the periglacial setting of West Greenland
The article deals with the cryogenic processes taking place in the terminal zone of the recessing glacier of SW Greenland, which modify the sediment layers and transform the landforms. The sediment horizons were examined in natural outcrops and in trenches. Structural analysis of periglacial sedimen...
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ftlithuaniansrc:oai:elaba:5832123 2023-05-15T16:21:07+02:00 Transformation of landforms and sediments in the periglacial setting of West Greenland Reljefo formų ir nuogulų transformacijos periglacialinėmis sąlygomis (Vakarų Grenlandija) Česnulevičius, Algimantas Šeirienė, Vaida 2009 http://lmavb.lvb.lt/LMAVB:ELABAPDB5832123&prefLang=en_US lit eng lit eng info:eu-repo/semantics/altIdentifier/doi/10.2478/v10056-009-0004-2 http://lmavb.lvb.lt/LMAVB:ELABAPDB5832123&prefLang=en_US Geologija, 2009, Vol. 51, no. 1/2 (65/66), p. 33-41 ISSN 1392-110X Sediments Forms of relief Aeolian Periglacial Cryoturbation Permafrost Sedimentary environment Diatoms Russell glacier Greenland info:eu-repo/semantics/article 2009 ftlithuaniansrc https://doi.org/10.2478/v10056-009-0004-2 2021-12-02T00:34:31Z The article deals with the cryogenic processes taking place in the terminal zone of the recessing glacier of SW Greenland, which modify the sediment layers and transform the landforms. The sediment horizons were examined in natural outcrops and in trenches. Structural analysis of periglacial sediments in the slopes has shown that subdued evaporation and shallow permafrost favour the development of cryoturbations. In relief declensions, the formation of polygonal surfaces is predetermined by shallow beds of magmatic rocks, permafrost and especially slow evaporation during short warm seasons. Aeolian processes are most active in the valleys sculptured by glaciofluvial flows where cold arid winds blow out or rework inequigranular deposits. Dust is blown out by wind erosion, whereas the coarse-grained material is transported by creeping or saltation. Sand ripple and embryo dune terrains are widespread in glaciofluvial valleys. Wind erosion processes forming pebble-boulder deflation pavements take place in relief declensions. Outcrops sized 10-60 m2 and niches develop in the hill slopes. Diatoms indicate that sedimentation in small closed basins took place under cold, oligotrophic, acidophilous conditions. Article in Journal/Newspaper glacier Greenland permafrost LSRC VL (Lithuanian Social Research Centre Virtual Library) Greenland Geologija 51 1 33 41 |
institution |
Open Polar |
collection |
LSRC VL (Lithuanian Social Research Centre Virtual Library) |
op_collection_id |
ftlithuaniansrc |
language |
Lithuanian English |
topic |
Sediments Forms of relief Aeolian Periglacial Cryoturbation Permafrost Sedimentary environment Diatoms Russell glacier Greenland |
spellingShingle |
Sediments Forms of relief Aeolian Periglacial Cryoturbation Permafrost Sedimentary environment Diatoms Russell glacier Greenland Česnulevičius, Algimantas Šeirienė, Vaida Transformation of landforms and sediments in the periglacial setting of West Greenland |
topic_facet |
Sediments Forms of relief Aeolian Periglacial Cryoturbation Permafrost Sedimentary environment Diatoms Russell glacier Greenland |
description |
The article deals with the cryogenic processes taking place in the terminal zone of the recessing glacier of SW Greenland, which modify the sediment layers and transform the landforms. The sediment horizons were examined in natural outcrops and in trenches. Structural analysis of periglacial sediments in the slopes has shown that subdued evaporation and shallow permafrost favour the development of cryoturbations. In relief declensions, the formation of polygonal surfaces is predetermined by shallow beds of magmatic rocks, permafrost and especially slow evaporation during short warm seasons. Aeolian processes are most active in the valleys sculptured by glaciofluvial flows where cold arid winds blow out or rework inequigranular deposits. Dust is blown out by wind erosion, whereas the coarse-grained material is transported by creeping or saltation. Sand ripple and embryo dune terrains are widespread in glaciofluvial valleys. Wind erosion processes forming pebble-boulder deflation pavements take place in relief declensions. Outcrops sized 10-60 m2 and niches develop in the hill slopes. Diatoms indicate that sedimentation in small closed basins took place under cold, oligotrophic, acidophilous conditions. |
format |
Article in Journal/Newspaper |
author |
Česnulevičius, Algimantas Šeirienė, Vaida |
author_facet |
Česnulevičius, Algimantas Šeirienė, Vaida |
author_sort |
Česnulevičius, Algimantas |
title |
Transformation of landforms and sediments in the periglacial setting of West Greenland |
title_short |
Transformation of landforms and sediments in the periglacial setting of West Greenland |
title_full |
Transformation of landforms and sediments in the periglacial setting of West Greenland |
title_fullStr |
Transformation of landforms and sediments in the periglacial setting of West Greenland |
title_full_unstemmed |
Transformation of landforms and sediments in the periglacial setting of West Greenland |
title_sort |
transformation of landforms and sediments in the periglacial setting of west greenland |
publishDate |
2009 |
url |
http://lmavb.lvb.lt/LMAVB:ELABAPDB5832123&prefLang=en_US |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland permafrost |
genre_facet |
glacier Greenland permafrost |
op_source |
Geologija, 2009, Vol. 51, no. 1/2 (65/66), p. 33-41 ISSN 1392-110X |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2478/v10056-009-0004-2 http://lmavb.lvb.lt/LMAVB:ELABAPDB5832123&prefLang=en_US |
op_doi |
https://doi.org/10.2478/v10056-009-0004-2 |
container_title |
Geologija |
container_volume |
51 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
41 |
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1766009129230401536 |