Striated Ground in the Venezuelan Andes
Striated ground was found above 3 600 m elevation in the Páramo de La Culata, Pico Espejo and Pico Bolívar areas of the central Venezuelan Andes. This ground, formed by nocturnal freezing and diurnal thawing of the contained water, consisted of aligned lumps of fine to coarse sand, separated by smal...
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Language: | English |
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Cambridge University Press (CUP)
1973
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Online Access: | http://dx.doi.org/10.1017/s0022143000031877 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000031877 |
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crcambridgeupr:10.1017/s0022143000031877 2024-03-03T08:46:06+00:00 Striated Ground in the Venezuelan Andes Schubert, Carlos 1973 http://dx.doi.org/10.1017/s0022143000031877 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000031877 en eng Cambridge University Press (CUP) Journal of Glaciology volume 12, issue 66, page 461-468 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1973 crcambridgeupr https://doi.org/10.1017/s0022143000031877 2024-02-08T08:38:15Z Striated ground was found above 3 600 m elevation in the Páramo de La Culata, Pico Espejo and Pico Bolívar areas of the central Venezuelan Andes. This ground, formed by nocturnal freezing and diurnal thawing of the contained water, consisted of aligned lumps of fine to coarse sand, separated by small discontinuous channels (1–3 cm wide). Sorting was observed in the form of pebble-rich and pebble-poor zones. Striated ground in the process of formation showed that needle ice filled the channels before thawing. Lack of sorting is an indication of very recent formation, probably the previous night. The orientation of the striae is compared with the wind direction. This indicates that the formation of needle ice in the ground reflects the direction of the freezing wind, producing striae orientated in that direction, thus supporting Troll’s (1944) original observations. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 12 66 461 468 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Schubert, Carlos Striated Ground in the Venezuelan Andes |
topic_facet |
Earth-Surface Processes |
description |
Striated ground was found above 3 600 m elevation in the Páramo de La Culata, Pico Espejo and Pico Bolívar areas of the central Venezuelan Andes. This ground, formed by nocturnal freezing and diurnal thawing of the contained water, consisted of aligned lumps of fine to coarse sand, separated by small discontinuous channels (1–3 cm wide). Sorting was observed in the form of pebble-rich and pebble-poor zones. Striated ground in the process of formation showed that needle ice filled the channels before thawing. Lack of sorting is an indication of very recent formation, probably the previous night. The orientation of the striae is compared with the wind direction. This indicates that the formation of needle ice in the ground reflects the direction of the freezing wind, producing striae orientated in that direction, thus supporting Troll’s (1944) original observations. |
format |
Article in Journal/Newspaper |
author |
Schubert, Carlos |
author_facet |
Schubert, Carlos |
author_sort |
Schubert, Carlos |
title |
Striated Ground in the Venezuelan Andes |
title_short |
Striated Ground in the Venezuelan Andes |
title_full |
Striated Ground in the Venezuelan Andes |
title_fullStr |
Striated Ground in the Venezuelan Andes |
title_full_unstemmed |
Striated Ground in the Venezuelan Andes |
title_sort |
striated ground in the venezuelan andes |
publisher |
Cambridge University Press (CUP) |
publishDate |
1973 |
url |
http://dx.doi.org/10.1017/s0022143000031877 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000031877 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 12, issue 66, page 461-468 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000031877 |
container_title |
Journal of Glaciology |
container_volume |
12 |
container_issue |
66 |
container_start_page |
461 |
op_container_end_page |
468 |
_version_ |
1792502012182528000 |