Crag-and-tail features on the Amundsen Sea continental shelf, West Antarctica

On parts of glaciated continental margins, especially the inner shelves around Antarctica, grounded ice has removed pre-existing sedimentary cover, leaving subglacial bedforms on eroded substrates (Anderson et al. 2001; Wellner et al. 2001). While the dominant subglacial bedforms often follow a dist...

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Bibliographic Details
Published in:Geological Society, London, Memoirs
Main Authors: Nitsche, F. O., Larter, R. D., Gohl, K., Graham, A. G. C., Kuhn, G.
Other Authors: Dowdeswell, J.A., Canals, M., Jakobsson, M., Todd, B.J., Dowdeswell, E.K., Hogan, K.A.
Format: Book Part
Language:unknown
Published: Geological Society of London 2016
Subjects:
West Antarctica
Amundsen Sea
Antarc*
Antarctica
Online Access:http://nora.nerc.ac.uk/id/eprint/516777/
https://doi.org/10.1144/M46.2
Description
Summary:On parts of glaciated continental margins, especially the inner shelves around Antarctica, grounded ice has removed pre-existing sedimentary cover, leaving subglacial bedforms on eroded substrates (Anderson et al. 2001; Wellner et al. 2001). While the dominant subglacial bedforms often follow a distinct, relatively uniform pattern that can be related to overall trends in palaeo-ice flow and substrate geology (Wellner et al. 2006), others are more randomly distributed and may reflect local substrate variations. Here we describe and discuss examples of large, isolated crag-and-tail features that are recognized on the Amundsen Sea continental shelf.

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