Cryoplanation surfaces in the central andes at latitude 35º S
Abstract A survey of cryoplanation surfaces in the Andean mountain range near latitude 35º south, and longitude 70º west shows cryoplanation surfaces are present on plutonic, volcanic, sedimentary and metamorphic rocks. Gypsum mountains above the lower limit of permafrost do not show cryoplanation....
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1991
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ppp.3430020109 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430020109 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430020109 |
id |
crwiley:10.1002/ppp.3430020109 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ppp.3430020109 2024-06-02T08:13:02+00:00 Cryoplanation surfaces in the central andes at latitude 35º S Grosso, Santiago A. Corte, Arturo E. 1991 http://dx.doi.org/10.1002/ppp.3430020109 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430020109 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430020109 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 2, issue 1, page 49-58 ISSN 1045-6740 1099-1530 journal-article 1991 crwiley https://doi.org/10.1002/ppp.3430020109 2024-05-03T12:00:12Z Abstract A survey of cryoplanation surfaces in the Andean mountain range near latitude 35º south, and longitude 70º west shows cryoplanation surfaces are present on plutonic, volcanic, sedimentary and metamorphic rocks. Gypsum mountains above the lower limit of permafrost do not show cryoplanation. Most cryoplanation terraces are in areas with mean annual air temperature below −1ºC, (i.e. above the lowest limit of sporadic permafrost at 2800 m). The largest cryoplanation surfaces are observed on sedimentary rocks and located in areas where mean annual air temperatures are near 0ºC. Possibly, these surfaces are inactive under the present climate and were formed in a colder, past cryogenic episode. The largest cryoplanation surfaces are formed in sedimentary rocks, followed by volcanic, metamorphic and intrusive rocks. Gypsum rocks of low frost susceptibility (non‐porous) do not produce cryoplanation terraces. Cryoplanation is thought to be the result of frost shattering, frost heave and gelifluction of frost‐susceptible (porous) rocks in a climate with numerous freeze‐thaw cycles. Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 2 1 49 58 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract A survey of cryoplanation surfaces in the Andean mountain range near latitude 35º south, and longitude 70º west shows cryoplanation surfaces are present on plutonic, volcanic, sedimentary and metamorphic rocks. Gypsum mountains above the lower limit of permafrost do not show cryoplanation. Most cryoplanation terraces are in areas with mean annual air temperature below −1ºC, (i.e. above the lowest limit of sporadic permafrost at 2800 m). The largest cryoplanation surfaces are observed on sedimentary rocks and located in areas where mean annual air temperatures are near 0ºC. Possibly, these surfaces are inactive under the present climate and were formed in a colder, past cryogenic episode. The largest cryoplanation surfaces are formed in sedimentary rocks, followed by volcanic, metamorphic and intrusive rocks. Gypsum rocks of low frost susceptibility (non‐porous) do not produce cryoplanation terraces. Cryoplanation is thought to be the result of frost shattering, frost heave and gelifluction of frost‐susceptible (porous) rocks in a climate with numerous freeze‐thaw cycles. |
format |
Article in Journal/Newspaper |
author |
Grosso, Santiago A. Corte, Arturo E. |
spellingShingle |
Grosso, Santiago A. Corte, Arturo E. Cryoplanation surfaces in the central andes at latitude 35º S |
author_facet |
Grosso, Santiago A. Corte, Arturo E. |
author_sort |
Grosso, Santiago A. |
title |
Cryoplanation surfaces in the central andes at latitude 35º S |
title_short |
Cryoplanation surfaces in the central andes at latitude 35º S |
title_full |
Cryoplanation surfaces in the central andes at latitude 35º S |
title_fullStr |
Cryoplanation surfaces in the central andes at latitude 35º S |
title_full_unstemmed |
Cryoplanation surfaces in the central andes at latitude 35º S |
title_sort |
cryoplanation surfaces in the central andes at latitude 35º s |
publisher |
Wiley |
publishDate |
1991 |
url |
http://dx.doi.org/10.1002/ppp.3430020109 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430020109 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430020109 |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 2, issue 1, page 49-58 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.3430020109 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
2 |
container_issue |
1 |
container_start_page |
49 |
op_container_end_page |
58 |
_version_ |
1800759679781961728 |