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

King, Edward, Woodward, John and Smith, Andrew (2004) Seismic evidence for a water-filled canal in deforming till beneath Rutford Ice Stream, West Antarctica. Geophysical Research Letters, 31 (20). L20401-4. ISSN 0094-8276

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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.

Item Type:	Article
Uncontrolled Keywords:	Acoustic properties; Antarctica; seismology; sub-ice drainage; ice streams
Subjects:	F800 Physical and Terrestrial Geographical and Environmental Sciences
Department:	Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User:	Becky Skoyles
Date Deposited:	03 Feb 2015 16:56
Last Modified:	13 Oct 2019 00:23
URI:	http://nrl.northumbria.ac.uk/id/eprint/19654

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