Seismic evidence for a water-filled canal in deforming till beneath Rutford Ice Stream, West Antarctica
Seismic data from Rutford Ice West Antarctica Stream, how high amplitude, reversed-polarity reflections from parts of the bed. Only interfaces between ice and water, or between water and sediment have the acoustic properties to produce such strong reflections - ice/sediment interfaces produce much w...
| Published in: | Geophysical Research Letters |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
American Geophysical Union
2004
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| Subjects: | |
| Online Access: | https://nrl.northumbria.ac.uk/id/eprint/19654/ https://doi.org/10.1029/2004GL020379 |
| Summary: | Seismic data from Rutford Ice West Antarctica Stream, how high amplitude, reversed-polarity reflections from parts of the bed. Only interfaces between ice and water, or between water and sediment have the acoustic properties to produce such strong reflections - ice/sediment interfaces produce much weaker echoes. The evidence suggests that an area of the ice stream measuring ar least 1 km by 0.2 km is underlain by water with a depth of less than 1 m. The data are consistent with the presence of a sub-ice drainage system comprising shallow canals cut into the sedimentary substrate, as predicted by theory. |
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