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Corrugation ridges in the Pine Island Bay glacier trough, West Antarctica

M. Jakobsson and J. B. Anderson
Geological Society, London, Memoirs, 46, 265-266, 30 November 2016, https://doi.org/10.1144/M46.5
M. Jakobsson
1Department of Geological Sciences, Stockholm University, Svante Arrhenius väg 8, 106 91 Stockholm, Sweden
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J. B. Anderson
2Department of Earth Sciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
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Glacial landforms with dimensions smaller than the imaging capability of the first-generation multibeam sonars will become a more frequent topic as high-resolution seafloor mapping technology advances. In Pine Island Bay (PIB) glacial trough, West Antarctica, small regular ridges of only a few metres from trough to crest were mapped in water depths of about 700 m. The small size of these ridges is at the limit of what modern deep-water multibeam sonars are capable of mapping. The ridges are interpreted to have been formed at the trailing edge of mega-icebergs moving up and down in response to tides while ploughing the seafloor (Jakobsson et al. 2011). The mega-icebergs in PIB were produced by ice shelf break-up and associated grounding-zone retreat.

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The glacial trough in central PIB contains a suite of landforms indicative of fast-flowing ice streams and episodic ice-sheet retreat following the Last Glacial Maximum (Anderson et al. 2002; Graham et al. 2010; Jakobsson et al. 2011). The relatively …

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Geological Society, London, Memoirs: 46 (1)
Geological Society, London, Memoirs
Volume 46
2016
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Corrugation ridges in the Pine Island Bay glacier trough, West Antarctica

M. Jakobsson and J. B. Anderson
Geological Society, London, Memoirs, 46, 265-266, 30 November 2016, https://doi.org/10.1144/M46.5
M. Jakobsson
1Department of Geological Sciences, Stockholm University, Svante Arrhenius väg 8, 106 91 Stockholm, Sweden
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  • For correspondence: [email protected]
J. B. Anderson
2Department of Earth Sciences, Rice University, 6100 Main Street, Houston, Texas 77005, USA
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Corrugation ridges in the Pine Island Bay glacier trough, West Antarctica

M. Jakobsson and J. B. Anderson
Geological Society, London, Memoirs, 46, 265-266, 30 November 2016, https://doi.org/10.1144/M46.5
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