Abstract
A detailed study of a proglacial bedrock site and a subglacial cavity of an outlet of Oksfjordjokelen, Norway, is presented together with observations from the fore-land of Konowbreen, Spitsbergen. Striation directions and subglacial observations indicate that local ice-flow paths were highly variable, deviating at angles of approximately 90 degrees from the main ice-flow direction. Stepped bedrock topography appears conducive to the production of highly variable ice-flow paths, because the high bed roughness creates a locally variable stress regime within the ice, including low-pressure, lee-side areas into which ice can flow. If ice flow is sustained along a specific path and the ice contains debris, then abrasion should produce an erosional bedform. Models are proposed whereby locally variable ice-flow patterns could produce erosional bedforms, which would be described as p-forms, purely through mechanical abrasion.
Original language | English |
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Pages (from-to) | 470-476 |
Number of pages | 7 |
Journal | Journal of Glaciology |
Volume | 46 |
Issue number | 154 |
Publication status | Published - 2000 |
Externally published | Yes |
Keywords
- ONTARIO