Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands
The paper presents a case study of sediment, termed soft lodgement till (a product of subglacial deposition by active ice), described previously on the basis of macro-evidence from Poland and Canada but not yet studied in detail in one particular site. The till at Anielinek (about 7 m thick) was exa...
Published in: | Canadian Journal of Earth Sciences |
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2009
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crcansciencepubl:10.1139/e09-003 2023-12-17T10:30:36+01:00 Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands Ruszczyńska-Szenajch, Hanna Trzciński, Jerzy Hillaire-Marcel, Claude 2009 http://dx.doi.org/10.1139/e09-003 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E09-003 http://www.nrcresearchpress.com/doi/pdf/10.1139/E09-003 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 46, issue 2, page 67-82 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2009 crcansciencepubl https://doi.org/10.1139/e09-003 2023-11-19T13:38:34Z The paper presents a case study of sediment, termed soft lodgement till (a product of subglacial deposition by active ice), described previously on the basis of macro-evidence from Poland and Canada but not yet studied in detail in one particular site. The till at Anielinek (about 7 m thick) was examined by macroscopic observation, thin section description, and qualitative and quantitative scanning electron microscopy (SEM) analyses. It shows a macroscopic massive structure and overlies a flat top of glaciolacustrine sediments. These sediments form upward intrusions within the till—owing to the existence of reversed density gradients among the deposits—and the upper parts of the intrusions are tilted in consistent directions within the successive parts of the till. Moreover, SEM images also record uniformly oriented microintrusions within this diamictic material. The occurrence of these macro- and microstructures within the successive parts of the till point to an almost continuous process of intrusion during ongoing deposition of the till and to water saturation of the subglacial environment. Such conditions reduced friction of the glacier bed against its substratum, and glacial debris must have been mainly melt-released from the moving glacier base. This process was responsible for deposition of sediment (soft lodgement till) that was immediately and continuously deformed by glacial stress during the ongoing accretion of debris from the glacier base. Article in Journal/Newspaper glacier* Canadian Science Publishing (via Crossref) Canada Flat Top ENVELOPE(-137.387,-137.387,63.225,63.225) Canadian Journal of Earth Sciences 46 2 67 82 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Ruszczyńska-Szenajch, Hanna Trzciński, Jerzy Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
topic_facet |
General Earth and Planetary Sciences |
description |
The paper presents a case study of sediment, termed soft lodgement till (a product of subglacial deposition by active ice), described previously on the basis of macro-evidence from Poland and Canada but not yet studied in detail in one particular site. The till at Anielinek (about 7 m thick) was examined by macroscopic observation, thin section description, and qualitative and quantitative scanning electron microscopy (SEM) analyses. It shows a macroscopic massive structure and overlies a flat top of glaciolacustrine sediments. These sediments form upward intrusions within the till—owing to the existence of reversed density gradients among the deposits—and the upper parts of the intrusions are tilted in consistent directions within the successive parts of the till. Moreover, SEM images also record uniformly oriented microintrusions within this diamictic material. The occurrence of these macro- and microstructures within the successive parts of the till point to an almost continuous process of intrusion during ongoing deposition of the till and to water saturation of the subglacial environment. Such conditions reduced friction of the glacier bed against its substratum, and glacial debris must have been mainly melt-released from the moving glacier base. This process was responsible for deposition of sediment (soft lodgement till) that was immediately and continuously deformed by glacial stress during the ongoing accretion of debris from the glacier base. |
author2 |
Hillaire-Marcel, Claude |
format |
Article in Journal/Newspaper |
author |
Ruszczyńska-Szenajch, Hanna Trzciński, Jerzy |
author_facet |
Ruszczyńska-Szenajch, Hanna Trzciński, Jerzy |
author_sort |
Ruszczyńska-Szenajch, Hanna |
title |
Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
title_short |
Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
title_full |
Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
title_fullStr |
Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
title_full_unstemmed |
Soft lodgement till deposition and syndepositional deformation, Anielinek, the Polish Lowlands |
title_sort |
soft lodgement till deposition and syndepositional deformation, anielinek, the polish lowlands |
publisher |
Canadian Science Publishing |
publishDate |
2009 |
url |
http://dx.doi.org/10.1139/e09-003 http://www.nrcresearchpress.com/doi/full-xml/10.1139/E09-003 http://www.nrcresearchpress.com/doi/pdf/10.1139/E09-003 |
long_lat |
ENVELOPE(-137.387,-137.387,63.225,63.225) |
geographic |
Canada Flat Top |
geographic_facet |
Canada Flat Top |
genre |
glacier* |
genre_facet |
glacier* |
op_source |
Canadian Journal of Earth Sciences volume 46, issue 2, page 67-82 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e09-003 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
46 |
container_issue |
2 |
container_start_page |
67 |
op_container_end_page |
82 |
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1785583586488877056 |