Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica
A multidisciplinary study was carried out to understand the interactions between biotic and abiotic processes in granite weathering in ice-free areas of northern Victoria Land, Antarctica. Examples of tafoni, pits and grooves were analyzed, focusing on their morphometry, infills, weathering rind typ...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | http://hdl.handle.net/11392/1199241 https://doi.org/10.1002/ppp.514 |
id |
ftunivferrarair:oai:iris.unife.it:11392/1199241 |
---|---|
record_format |
openpolar |
spelling |
ftunivferrarair:oai:iris.unife.it:11392/1199241 2024-02-11T09:58:25+01:00 Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica GUGLIELMIN M. STRINI A. LEWKOWICZ A. G. CANNONE, Nicoletta Guglielmin, M. Cannone, Nicoletta Strini, A. Lewkowicz, A. G. 2005 STAMPA http://hdl.handle.net/11392/1199241 https://doi.org/10.1002/ppp.514 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000228072800006 volume:16 firstpage:69 lastpage:85 journal:PERMAFROST AND PERIGLACIAL PROCESSES http://hdl.handle.net/11392/1199241 doi:10.1002/ppp.514 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-15844376258 cold-climate weathering tafoni Antarctica info:eu-repo/semantics/article 2005 ftunivferrarair https://doi.org/10.1002/ppp.514 2024-01-24T17:36:29Z A multidisciplinary study was carried out to understand the interactions between biotic and abiotic processes in granite weathering in ice-free areas of northern Victoria Land, Antarctica. Examples of tafoni, pits and grooves were analyzed, focusing on their morphometry, infills, weathering rind types and vegetation patterns. Surface and subsurface temperatures and incoming radiation were measured to characterize microclimatic conditions. In addition, microscopic, SEM and X-ray diffraction analyses of granite were carried out. These analyses indicate that, under present conditions, mechanical weathering is the main process active in the formation of tafoni, which post-date pits and grooves. In these forms, granular disintegration is mainly induced by chasmoendolithic lichens, salt and thermal stress associated with the dilatation coefficients of different granite-forming minerals. The overall morphology of pits and grooves indicates that they originate from water erosion. In the former, mechanical weathering prevails, caused by epilithic lichens, by freeze-thaw events, and by salt, while only the first two processes are active in the grooves. The intensity of these processes is less effective than in tafoni and on the outer surfaces, suggesting that pits and grooves are inherited features, possibly generated in the same way as landforms occurring on granite in the humid tropics. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Università degli Studi di Ferrara: CINECA IRIS Victoria Land Permafrost and Periglacial Processes 16 1 69 85 |
institution |
Open Polar |
collection |
Università degli Studi di Ferrara: CINECA IRIS |
op_collection_id |
ftunivferrarair |
language |
English |
topic |
cold-climate weathering tafoni Antarctica |
spellingShingle |
cold-climate weathering tafoni Antarctica GUGLIELMIN M. STRINI A. LEWKOWICZ A. G. CANNONE, Nicoletta Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
topic_facet |
cold-climate weathering tafoni Antarctica |
description |
A multidisciplinary study was carried out to understand the interactions between biotic and abiotic processes in granite weathering in ice-free areas of northern Victoria Land, Antarctica. Examples of tafoni, pits and grooves were analyzed, focusing on their morphometry, infills, weathering rind types and vegetation patterns. Surface and subsurface temperatures and incoming radiation were measured to characterize microclimatic conditions. In addition, microscopic, SEM and X-ray diffraction analyses of granite were carried out. These analyses indicate that, under present conditions, mechanical weathering is the main process active in the formation of tafoni, which post-date pits and grooves. In these forms, granular disintegration is mainly induced by chasmoendolithic lichens, salt and thermal stress associated with the dilatation coefficients of different granite-forming minerals. The overall morphology of pits and grooves indicates that they originate from water erosion. In the former, mechanical weathering prevails, caused by epilithic lichens, by freeze-thaw events, and by salt, while only the first two processes are active in the grooves. The intensity of these processes is less effective than in tafoni and on the outer surfaces, suggesting that pits and grooves are inherited features, possibly generated in the same way as landforms occurring on granite in the humid tropics. |
author2 |
Guglielmin, M. Cannone, Nicoletta Strini, A. Lewkowicz, A. G. |
format |
Article in Journal/Newspaper |
author |
GUGLIELMIN M. STRINI A. LEWKOWICZ A. G. CANNONE, Nicoletta |
author_facet |
GUGLIELMIN M. STRINI A. LEWKOWICZ A. G. CANNONE, Nicoletta |
author_sort |
GUGLIELMIN M. |
title |
Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
title_short |
Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
title_full |
Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
title_fullStr |
Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
title_full_unstemmed |
Biotic and Abiotic Processes on Granite Weathering Landforms in cryotic environment, Northern Victoria Land, Antarctica |
title_sort |
biotic and abiotic processes on granite weathering landforms in cryotic environment, northern victoria land, antarctica |
publishDate |
2005 |
url |
http://hdl.handle.net/11392/1199241 https://doi.org/10.1002/ppp.514 |
geographic |
Victoria Land |
geographic_facet |
Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000228072800006 volume:16 firstpage:69 lastpage:85 journal:PERMAFROST AND PERIGLACIAL PROCESSES http://hdl.handle.net/11392/1199241 doi:10.1002/ppp.514 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-15844376258 |
op_doi |
https://doi.org/10.1002/ppp.514 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
16 |
container_issue |
1 |
container_start_page |
69 |
op_container_end_page |
85 |
_version_ |
1790594059461459968 |