Development of transverse ridges on rock glaciers: field measurements and laboratory experiments
Very high‐resolution photogrammetric and geodetic measurements about the deformation of transverse ridges on Murtèl, Muragl and Suvretta rock glaciers in the Swiss Alps are discussed. The ridges are advected downstreams with a speed that equals the overall speed of the creeping permafrost within the...
Published in: | Permafrost and Periglacial Processes |
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Format: | Article in Journal/Newspaper |
Language: | unknown |
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Online Access: | https://doi.org/10.1002/ppp.506 |
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ftrepec:oai:RePEc:wly:perpro:v:15:y:2004:i:4:p:379-391 2023-05-15T17:57:39+02:00 Development of transverse ridges on rock glaciers: field measurements and laboratory experiments A. Kääb M. Weber https://doi.org/10.1002/ppp.506 unknown https://doi.org/10.1002/ppp.506 article ftrepec https://doi.org/10.1002/ppp.506 2020-12-04T13:31:03Z Very high‐resolution photogrammetric and geodetic measurements about the deformation of transverse ridges on Murtèl, Muragl and Suvretta rock glaciers in the Swiss Alps are discussed. The ridges are advected downstreams with a speed that equals the overall speed of the creeping permafrost within the significance level of the applied techniques. Any process of ridge formation is, thus, overlain on the mass creep. In fact, measurements yield local speed maxima on top of the ridges that can be explained by differential movement due to ridge growth through bulging under compressive flow. This hypothesis is consistent with results from laboratory experiments that were performed on a model ramp employing mixtures of Xanthan Gum, sand and gravel. Indications were also found that overthrusting is involved in the development of transverse ridges on rock glaciers. Copyright © 2004 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 15 4 379 391 |
institution |
Open Polar |
collection |
RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
Very high‐resolution photogrammetric and geodetic measurements about the deformation of transverse ridges on Murtèl, Muragl and Suvretta rock glaciers in the Swiss Alps are discussed. The ridges are advected downstreams with a speed that equals the overall speed of the creeping permafrost within the significance level of the applied techniques. Any process of ridge formation is, thus, overlain on the mass creep. In fact, measurements yield local speed maxima on top of the ridges that can be explained by differential movement due to ridge growth through bulging under compressive flow. This hypothesis is consistent with results from laboratory experiments that were performed on a model ramp employing mixtures of Xanthan Gum, sand and gravel. Indications were also found that overthrusting is involved in the development of transverse ridges on rock glaciers. Copyright © 2004 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
A. Kääb M. Weber |
spellingShingle |
A. Kääb M. Weber Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
author_facet |
A. Kääb M. Weber |
author_sort |
A. Kääb |
title |
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
title_short |
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
title_full |
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
title_fullStr |
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
title_full_unstemmed |
Development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
title_sort |
development of transverse ridges on rock glaciers: field measurements and laboratory experiments |
url |
https://doi.org/10.1002/ppp.506 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://doi.org/10.1002/ppp.506 |
op_doi |
https://doi.org/10.1002/ppp.506 |
container_title |
Permafrost and Periglacial Processes |
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15 |
container_issue |
4 |
container_start_page |
379 |
op_container_end_page |
391 |
_version_ |
1766166132004225024 |