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

Edward King, John Woodward, Andrew Smith

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)L20401-4
JournalGeophysical Research Letters
Volume31
Issue number20
DOIs
Publication statusPublished - Oct 2004

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