Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny
Glaciofluvial and glaciolacustrine sediments were discovered in a small sandpit situated 800 m SE from Vindava (the Polský kopec Site). Sediments fill two channels located in superposition. Three facies associations (FA) were distinguished in this sedimentary section. The base of the lower channel i...
Published in: | Geologické výzkumy na Moravě a ve Slezsku |
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Masaryk University Press
2020
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Online Access: | http://dx.doi.org/10.5817/gvms2020-13660 https://journals.muni.cz/gvms/article/viewFile/13660/11708 https://journals.muni.cz/gvms/article/viewFile/13660/11709 |
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crmasarykunivpr:10.5817/gvms2020-13660 2024-05-19T07:42:12+00:00 Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny Hanáček, Martin Adameková, Katarína 2020 http://dx.doi.org/10.5817/gvms2020-13660 https://journals.muni.cz/gvms/article/viewFile/13660/11708 https://journals.muni.cz/gvms/article/viewFile/13660/11709 unknown Masaryk University Press Geologické výzkumy na Moravě a ve Slezsku volume 27, issue 1-2 ISSN 2336-4378 1212-6209 journal-article 2020 crmasarykunivpr https://doi.org/10.5817/gvms2020-13660 2024-04-30T06:41:27Z Glaciofluvial and glaciolacustrine sediments were discovered in a small sandpit situated 800 m SE from Vindava (the Polský kopec Site). Sediments fill two channels located in superposition. Three facies associations (FA) were distinguished in this sedimentary section. The base of the lower channel is formed by gravel lag overlain by gravel-sandy sediments of 3-D dunes and a side bar (FA1). The upper channel infill begins also by basal lag and grades to a fining-upwards sequence from sand to silt (FA2). The sequence is formed from the base up by sediments of small 3-D dunes, A-type ripples, B-type ripples, C-type ripples, and horizontally laminated sediments. The sequence reveals a vertical transition from glaciofluvial (sand) to glaciolacustrine (silt) sedimentation. The sedimentary section is terminated by flat glaciofluvial bedforms (FA3) deposited under upper plane bed conditions. These bedforms arose after the restoration of glaciofluvial conditions. The base of the glaciolacustrine sequence is located at an altitude of ~ 275 m as well as the Old Kaolin Mine Site (850 m SW from the Polský kopec Site) where very similar sediments have been already described. The sediments of both localities represent a proglacial outwash plain in front of the retreating ice sheet (FA1 consists of ~ 23% of erratic rocks), where a relatively large lake, or a system of smaller lakes evolved at the same time. Article in Journal/Newspaper Ice Sheet Munipress - Masaryk University Press Geologické výzkumy na Moravě a ve Slezsku 27 1-2 |
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Munipress - Masaryk University Press |
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crmasarykunivpr |
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description |
Glaciofluvial and glaciolacustrine sediments were discovered in a small sandpit situated 800 m SE from Vindava (the Polský kopec Site). Sediments fill two channels located in superposition. Three facies associations (FA) were distinguished in this sedimentary section. The base of the lower channel is formed by gravel lag overlain by gravel-sandy sediments of 3-D dunes and a side bar (FA1). The upper channel infill begins also by basal lag and grades to a fining-upwards sequence from sand to silt (FA2). The sequence is formed from the base up by sediments of small 3-D dunes, A-type ripples, B-type ripples, C-type ripples, and horizontally laminated sediments. The sequence reveals a vertical transition from glaciofluvial (sand) to glaciolacustrine (silt) sedimentation. The sedimentary section is terminated by flat glaciofluvial bedforms (FA3) deposited under upper plane bed conditions. These bedforms arose after the restoration of glaciofluvial conditions. The base of the glaciolacustrine sequence is located at an altitude of ~ 275 m as well as the Old Kaolin Mine Site (850 m SW from the Polský kopec Site) where very similar sediments have been already described. The sediments of both localities represent a proglacial outwash plain in front of the retreating ice sheet (FA1 consists of ~ 23% of erratic rocks), where a relatively large lake, or a system of smaller lakes evolved at the same time. |
format |
Article in Journal/Newspaper |
author |
Hanáček, Martin Adameková, Katarína |
spellingShingle |
Hanáček, Martin Adameková, Katarína Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
author_facet |
Hanáček, Martin Adameková, Katarína |
author_sort |
Hanáček, Martin |
title |
Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
title_short |
Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
title_full |
Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
title_fullStr |
Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
title_full_unstemmed |
Glacifluviálně-glacilakustrinní sekvence u Vidnavy na severním okraji Žulovské pahorkatiny |
title_sort |
glacifluviálně-glacilakustrinní sekvence u vidnavy na severním okraji žulovské pahorkatiny |
publisher |
Masaryk University Press |
publishDate |
2020 |
url |
http://dx.doi.org/10.5817/gvms2020-13660 https://journals.muni.cz/gvms/article/viewFile/13660/11708 https://journals.muni.cz/gvms/article/viewFile/13660/11709 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geologické výzkumy na Moravě a ve Slezsku volume 27, issue 1-2 ISSN 2336-4378 1212-6209 |
op_doi |
https://doi.org/10.5817/gvms2020-13660 |
container_title |
Geologické výzkumy na Moravě a ve Slezsku |
container_volume |
27 |
container_issue |
1-2 |
_version_ |
1799481853679239168 |