Seismic evidence for a water-filled canal in deforming till beneath Rutford Ice Stream, West Antarctica

Seismic data from Rutford Ice Stream, West Antarctica show 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 at 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.


Publication status:
Authors: King, Edward C. ORCIDORCID record for Edward C. King, Woodward, John, Smith, Andrew M. ORCIDORCID record for Andrew M. Smith

On this site: Andy Smith, Ed King
1 January, 2004
Geophysical Research Letters / 31
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