Current and Glacial Erosion on the Shelf off Mac. Robertson Land, East Antarctica

Harris, P. T.; O’Brien, P. E.

doi:10.1007/978-94-011-5820-6_82

P. T. Harris⁹ &
P. E. O’Brien¹⁰

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Abstract

Bathymetric, sidescan sonar, and high-resolution seismic data indicate that the shelf off Mac. Robertson Land, East Antarctica is deeply eroded by glaciers and currents. Basement is exposed over wide areas. Data available include MCS and 3.5 kHz obtained by Stagg (1985) in 1982 (see O’Brien et al, this volume, for details). In 1995 R.V. Aurora Australis collected bathymetric data using a Simrad EA200 12.5 KHz echo sounder and seismic data were obtained using a Seismic Systems Inc. generator-injector (GI) gun (150 cubic inches) with 4 groups (4 channels) of ten hydrophones. Analogue (uncorrected) sidescan sonar data were recorded using an EG&G 960 tow fish and an EG&G 996 digital modem connected to an EPS 9800 graphic recorder. The sidescan sonar was operated at ranges of 375 to 500 m.

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Authors and Affiliations

Antarctic CRC, Australian Geological Survey Organisation, University of Tasmania, GPO Box 252C, Hobart, Tasmania, Australia
P. T. Harris
Antarctic CRC, Australian Geological Survey Organisation, GPO Box 378, Canberra, ACT, 2601, Australia
P. E. O’Brien

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P. T. Harris
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P. E. O’Brien
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Editors and Affiliations

Institute for Geophysics, The University of Texas at Austria, 8701 N. MoPac Expressway, Austin, TX, 78759, USA
Thomas A. Davies
Department of Geography, Memorial University of Newfoundland, Alexander Murray Bldg., St. John’s, NF, A1B 3X5, Canada
Trevor Bell
Marine and Coastal Geology, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA, 94025-3591, USA
Alan K. Cooper
Bedford Institute of Oceanography, Geological Survey of Canada (Atlantic), P.O. Box 1006, Dartmouth, Nova Scotia, B26 4A2, Canada
Heiner Josenhans
Byrd Polar Research Center, 1090 Carmack Rd., Columbus, OH, 43210, USA
Leonid Polyak
Norwegian Polar Institute, P.O. Box 5072, Majorstua, Oslo, N0301, Norway
Anders Solheim
Murchison House, British Geological Survey, West Mains Road, Edinburgh, EH9 3LA, Scotland, UK
Martyn S. Stoker
Dept. of Geology, Northern Illinois University, DeKalb, IL, 60115, USA
Jay A. Stravers

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Harris, P.T., O’Brien, P.E. (1997). Current and Glacial Erosion on the Shelf off Mac. Robertson Land, East Antarctica. In: Davies, T.A., et al. Glaciated Continental Margins. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5820-6_82

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DOI: https://doi.org/10.1007/978-94-011-5820-6_82
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-412-79340-0
Online ISBN: 978-94-011-5820-6
eBook Packages: Springer Book Archive

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