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The links between structural glaciology, glacial debris entrainment and transport have been established in a number of different glacier settings. Here we document the structural evolution of a temperate Alpine valley glacier (Vadrec del Forno, Switzerland) and demonstrate that individual flow units within the glacier have very different structural and debris characteristics. The glacier consists of a broad accumulation area with multiple basins feeding a relatively narrowtongue and is formed from six distinct flowunits. Each flow unit has its own characteristic structural assemblage. Flow units that narrow rapidly down-glacier are dominated by primary stratification that has evolved into longitudinal foliation. In contrast, wider flow units preferentially develop an axial planar foliation. Glacier structure plays a limited role in the entrainment of debris, which ismore strongly influenced by ice-marginal rockfall and avalanche inputs onto the glacier surface. However, once entrained, glacier structure controls the reorientation and redistribution of debris within the ice mass. By taking a whole-glacier approach to describing glacier structure and debris transport, we conclude that individual flow units are unique with regard to structure and debris transfer. Copyright (C) 2013 John Wiley & Sons, Ltd.
|Number of pages||14|
|Journal||Earth Surface Processes and Landforms|
|Early online date||21 Jan 2014|
|Publication status||Published - 01 Aug 2014|
- Glacier structure
- Debris entrainment and transport
- Flow unit
- Swiss Alps
- Vadrec del Forno
- TEMPERATE VALLEY GLACIER
- MEDIAL MORAINES
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Origins of foliations and related phenomena in valley glaciers and ice sheetsAuthor: Jennings, S. J. A., 17 Feb 2017
Supervisor: Glasser, N. (Supervisor), Hubbard, B. (Supervisor) & Hambrey, M. (Supervisor)
Student thesis: Doctoral Thesis › Doctor of PhilosophyFile
- 1 Finished
Investigation into the structural characteristics of valley glacier foliations and subsequent comparison to large-scale ice sheet flowlines
Jennings, S. J. A.
03 Oct 2012 → 02 Apr 2016
Project: Externally funded research