The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia
ABSTRACT Quartz grains, 0.25−1.0 mm in diameter, taken from Pleistocene sands and a palaeo‐active layer in Poland (Łódź Teofilów) and from silty‐clayey sediments of the contemporary active layer near Ulaanbaatar (Mongolia) were analysed using a scanning electron microscope (SEM). Other analyses incl...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2011
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ppp.725 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.725 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.725 |
id |
crwiley:10.1002/ppp.725 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ppp.725 2024-06-02T08:13:10+00:00 The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia Woronko, Barbara Hoch, Małgorzata 2011 http://dx.doi.org/10.1002/ppp.725 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.725 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.725 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 22, issue 3, page 214-227 ISSN 1045-6740 1099-1530 journal-article 2011 crwiley https://doi.org/10.1002/ppp.725 2024-05-03T11:59:11Z ABSTRACT Quartz grains, 0.25−1.0 mm in diameter, taken from Pleistocene sands and a palaeo‐active layer in Poland (Łódź Teofilów) and from silty‐clayey sediments of the contemporary active layer near Ulaanbaatar (Mongolia) were analysed using a scanning electron microscope (SEM). Other analyses included granulometric composition, and frosting and rounding of quartz grains. The effects of frost weathering comprise several microstructures, such as breakage blocks (>10 µm and <10 µm), surface coating and scaling, among which breakage blocks <10 µm are apparently the most common. Two types of frost weathering were distinguished. Weathering of the P type is mainly initiated on convex fragments of grains as the result of ice segregation. Weathering of the F type is linked to the volumetric expansion of ice and usually observed within concave linear microstructures. A frost action index (FAI) was developed based on the frequency of occurrence of microstructures from frost weathering. The FAI value varies between 0 and 3, and the higher the value, the more intensive the frost weathering. The value of the FAI in sediments from the Polish study site is relatively low with a maximum barely exceeding 1. The FAI values from the Ulaanbaatar site are higher in all of the sediment samples with a maximum of 2. Copyright © 2011 John Wiley & Sons, Ltd. Article in Journal/Newspaper Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 22 3 214 227 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Quartz grains, 0.25−1.0 mm in diameter, taken from Pleistocene sands and a palaeo‐active layer in Poland (Łódź Teofilów) and from silty‐clayey sediments of the contemporary active layer near Ulaanbaatar (Mongolia) were analysed using a scanning electron microscope (SEM). Other analyses included granulometric composition, and frosting and rounding of quartz grains. The effects of frost weathering comprise several microstructures, such as breakage blocks (>10 µm and <10 µm), surface coating and scaling, among which breakage blocks <10 µm are apparently the most common. Two types of frost weathering were distinguished. Weathering of the P type is mainly initiated on convex fragments of grains as the result of ice segregation. Weathering of the F type is linked to the volumetric expansion of ice and usually observed within concave linear microstructures. A frost action index (FAI) was developed based on the frequency of occurrence of microstructures from frost weathering. The FAI value varies between 0 and 3, and the higher the value, the more intensive the frost weathering. The value of the FAI in sediments from the Polish study site is relatively low with a maximum barely exceeding 1. The FAI values from the Ulaanbaatar site are higher in all of the sediment samples with a maximum of 2. Copyright © 2011 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Woronko, Barbara Hoch, Małgorzata |
spellingShingle |
Woronko, Barbara Hoch, Małgorzata The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
author_facet |
Woronko, Barbara Hoch, Małgorzata |
author_sort |
Woronko, Barbara |
title |
The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
title_short |
The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
title_full |
The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
title_fullStr |
The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
title_full_unstemmed |
The Development of Frost‐weathering Microstructures on Sand‐sized Quartz Grains: Examples from Poland and Mongolia |
title_sort |
development of frost‐weathering microstructures on sand‐sized quartz grains: examples from poland and mongolia |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/ppp.725 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.725 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.725 |
genre |
Permafrost and Periglacial Processes |
genre_facet |
Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 22, issue 3, page 214-227 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.725 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
22 |
container_issue |
3 |
container_start_page |
214 |
op_container_end_page |
227 |
_version_ |
1800736535651287040 |