Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland
Analysis of the orientation of both positive and negative glacial morpholineaments (crevasse landforms) was performed on the areas covered by 12 selected map sheets of the Detailed Geological Map of Poland, scale 1:50 000, situated in NE Poland. Axes of these landforms form a net composed of four co...
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Polish Geological Institute-National Research Institute
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ftjgq:oai:geojournals.pgi.gov.pl:article/7386 2023-05-15T16:40:13+02:00 Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland Morawski, Wojciech 2010-03-27 application/pdf https://gq.pgi.gov.pl/article/view/7386 https://doi.org/10.7306/gq.v49i4.7386 eng eng Polish Geological Institute-National Research Institute https://gq.pgi.gov.pl/article/view/7386/6036 Geological Quarterly; Vol 49, No 4 (2005); 403-416 1641-7291 NE Poland; Pleistocene palaeogeography; glacial morpholineaments; crevasse landforms; glacial crevasses; ice flow direc info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2010 ftjgq https://doi.org/10.7306/gq.v49i4.7386 2019-08-13T19:05:52Z Analysis of the orientation of both positive and negative glacial morpholineaments (crevasse landforms) was performed on the areas covered by 12 selected map sheets of the Detailed Geological Map of Poland, scale 1:50 000, situated in NE Poland. Axes of these landforms form a net composed of four conjugate sets. This is a classical joint net developed due to horizontal stress, and composed of an orthogonal (extensional) system consisting of longitudinal and transversal sets, and a rhomboidal (shear) system consisting of two diagonal sets. Based on the orientation of glacial morpholineaments, inherited after the original joint net in the ice body, ice sheet advance directions -averaged for the area -- were determined. This method of reconstructing ice flow direction creates new possibilities of making synthetic regional analyses, in particular in terms of Pleistocene palaeogeographic investigations. The best potential for the method's use lies in areas of young post-glacial relief. In the region of NE Poland analyzed, these investigations enabled determination of different directions of ice flow within the Mazurian, Warmian and Vistulian ice sheet lobes of the last glaciation. Local changes in ice sheet movement directions were identified, and these reflected basement elevations (e.g. the Wiżajny Elevation). In other cases, basement irregularities influenced the opening of separate crevasse sets (e.g. outside of the Góra Dylewska massif) giving rise to a dominance of individual directions (sets) in the morpholineament orientation. This method can also be used in geological mapping. Article in Journal/Newspaper Ice Sheet Geological Quarterly |
institution |
Open Polar |
collection |
Geological Quarterly |
op_collection_id |
ftjgq |
language |
English |
topic |
NE Poland; Pleistocene palaeogeography; glacial morpholineaments; crevasse landforms; glacial crevasses; ice flow direc |
spellingShingle |
NE Poland; Pleistocene palaeogeography; glacial morpholineaments; crevasse landforms; glacial crevasses; ice flow direc Morawski, Wojciech Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
topic_facet |
NE Poland; Pleistocene palaeogeography; glacial morpholineaments; crevasse landforms; glacial crevasses; ice flow direc |
description |
Analysis of the orientation of both positive and negative glacial morpholineaments (crevasse landforms) was performed on the areas covered by 12 selected map sheets of the Detailed Geological Map of Poland, scale 1:50 000, situated in NE Poland. Axes of these landforms form a net composed of four conjugate sets. This is a classical joint net developed due to horizontal stress, and composed of an orthogonal (extensional) system consisting of longitudinal and transversal sets, and a rhomboidal (shear) system consisting of two diagonal sets. Based on the orientation of glacial morpholineaments, inherited after the original joint net in the ice body, ice sheet advance directions -averaged for the area -- were determined. This method of reconstructing ice flow direction creates new possibilities of making synthetic regional analyses, in particular in terms of Pleistocene palaeogeographic investigations. The best potential for the method's use lies in areas of young post-glacial relief. In the region of NE Poland analyzed, these investigations enabled determination of different directions of ice flow within the Mazurian, Warmian and Vistulian ice sheet lobes of the last glaciation. Local changes in ice sheet movement directions were identified, and these reflected basement elevations (e.g. the Wiżajny Elevation). In other cases, basement irregularities influenced the opening of separate crevasse sets (e.g. outside of the Góra Dylewska massif) giving rise to a dominance of individual directions (sets) in the morpholineament orientation. This method can also be used in geological mapping. |
format |
Article in Journal/Newspaper |
author |
Morawski, Wojciech |
author_facet |
Morawski, Wojciech |
author_sort |
Morawski, Wojciech |
title |
Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
title_short |
Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
title_full |
Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
title_fullStr |
Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
title_full_unstemmed |
Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern Poland |
title_sort |
reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms): an example from northeastern poland |
publisher |
Polish Geological Institute-National Research Institute |
publishDate |
2010 |
url |
https://gq.pgi.gov.pl/article/view/7386 https://doi.org/10.7306/gq.v49i4.7386 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geological Quarterly; Vol 49, No 4 (2005); 403-416 1641-7291 |
op_relation |
https://gq.pgi.gov.pl/article/view/7386/6036 |
op_doi |
https://doi.org/10.7306/gq.v49i4.7386 |
_version_ |
1766030592383647744 |