Conjectures, Hypotheses, and Theories of Drumlin Formation (In memory of Stanislaw Baranowski)
Abstract Recent investigations have shown that various factors may affect the shear strength of glacial till and that these factors may be involved in the drumlin-forming process. The presence of frozen till in the deforming zone, variation in pore-water pressure in the till, and the occurrence of r...
| Published in: | Journal of Glaciology |
|---|---|
| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1981
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0022143000011552 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000011552 |
| Summary: | Abstract Recent investigations have shown that various factors may affect the shear strength of glacial till and that these factors may be involved in the drumlin-forming process. The presence of frozen till in the deforming zone, variation in pore-water pressure in the till, and the occurrence of random patches of dense stony-till texture have been considered. The occurrence of dense stony till may relate to the dilatancy hypothesis and can be considered a likely drumlin-forming factor within the region of critical stress levels. The up-glacier stress level now appears to be the more important, and to provide a sharper division between drumlin-forming and non-drumlin-forming conditions. |
|---|