Sedimentary Geology
The Columbia Glacier is a large well studied tidewater glacier which has one of the highest non-surging modem glacier flow rates. Previous studies from ice drilling have tentatively suggested the presence of a deforming bed. This study examined the recently deglaciated (since 1974) foreland and conc...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1996
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.474.8856 http://www2.geog.soton.ac.uk/users/hartj/papers/col.pdf |
| Summary: | The Columbia Glacier is a large well studied tidewater glacier which has one of the highest non-surging modem glacier flow rates. Previous studies from ice drilling have tentatively suggested the presence of a deforming bed. This study examined the recently deglaciated (since 1974) foreland and concluded there were features indicative of deforming bed conditions, i.e., streamlined subglacial bedforms, squeeze-type ush moraines and crevasse diapirs. It was also argued that the elongation ratio and height of streamlined subglacial bedforms can be used as a proxy for shear strain and thickness of the deforming layer, respectively, and when these two parameters are combined together they produce a complex but predictable eigenvalue pattern in the tills comprising the landforms. |
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