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The bundle: a mega-scale glacial landform left by an ice stream, Western Bransfield Basin

M. Canals and D. Amblas
Geological Society, London, Memoirs, 46, 177-178, 30 November 2016, https://doi.org/10.1144/M46.157
M. Canals
GRC Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
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  • For correspondence: miquelcanals@ub.edu
D. Amblas
GRC Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
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Ice masses were grounded at or near the shelf edge around the Antarctic Peninsula (AP) at the Last Glacial Maximum (LGM). Post-LGM warming led to ice ungrounding and retreat, which proceeded asynchronously from north to south (Ó Cofaigh et al. 2014). Bransfield Basin (BB) is one of the first places in Antarctica where multibeam bathymetry was systematically collected in the 1990s, resulting in the early imaging of glacial landforms on the modern seafloor (e.g. Canals et al. 2000).

Description

BB is a 450 km long marginal rift basin extending between the northern tip of the AP and the South Shetland Islands (SSI) (Fig. 1b). The Western Bransfield Basin (WBB) extends from the mouth of Croker Passage (CP) to Boyd Strait (Fig. 1a). Its deepest part is bounded by the volcanic high of Deception Island to the NE and several continental shelves. WBB bifurcates into SW–NE and SE–NW orthogonal branches (Fig. 1a).

Fig. 1.

(a) Swath-bathymetric image of the Western Bransfield Basin. HFZ: Hero Fracture Zone. Acquisition system Simrad EM12-S. Frequency 12.5 kHz. Grid-cell size 200 m (colour) and GEBCO_08 Grid (grey). Land area from Landsat Image Mosaic of Antarctica (US Geological Survey). (b) Location of study area (red box; map from IBCSO v. 1.0). …

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Geological Society, London, Memoirs: 46 (1)
Geological Society, London, Memoirs
Volume 46
2016
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The bundle: a mega-scale glacial landform left by an ice stream, Western Bransfield Basin

M. Canals and D. Amblas
Geological Society, London, Memoirs, 46, 177-178, 30 November 2016, https://doi.org/10.1144/M46.157
M. Canals
GRC Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
  • Find this author on Google Scholar
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  • For correspondence: miquelcanals@ub.edu
D. Amblas
GRC Geociències Marines, Universitat de Barcelona, 08028 Barcelona, Spain
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The bundle: a mega-scale glacial landform left by an ice stream, Western Bransfield Basin

M. Canals and D. Amblas
Geological Society, London, Memoirs, 46, 177-178, 30 November 2016, https://doi.org/10.1144/M46.157
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