A note on needle‐ice mound formation in the High Drakensberg, Southern Africa
Abstract Small needle‐ice mounds are described from the High Drakensberg. They develop infrequently during periods of several days of uninterrupted cold conditions. Ice growth incorporates sediment and stones. An accumulated segregated ice length of >41 cm was measured, with clasts heaved ∼14 cm....
| Published in: | Permafrost and Periglacial Processes |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2002
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| Online Access: | http://dx.doi.org/10.1002/ppp.427 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.427 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.427 |
| Summary: | Abstract Small needle‐ice mounds are described from the High Drakensberg. They develop infrequently during periods of several days of uninterrupted cold conditions. Ice growth incorporates sediment and stones. An accumulated segregated ice length of >41 cm was measured, with clasts heaved ∼14 cm. During subsequent thaw phases, the ice ablates from the top downwards, forming sediment veneers and cappings. These mounds contribute towards turf exfoliation, thereby exposing sediment to deflation. Copyright © 2002 John Wiley & Sons, Ltd. |
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