Articles | Volume 18, issue 5
https://doi.org/10.5194/tc-18-2277-2024
https://doi.org/10.5194/tc-18-2277-2024
Research article
 | 
07 May 2024
Research article |  | 07 May 2024

Extensive palaeo-surfaces beneath the Evans–Rutford region of the West Antarctic Ice Sheet control modern and past ice flow

Charlotte M. Carter, Michael J. Bentley, Stewart S. R. Jamieson, Guy J. G. Paxman, Tom A. Jordan, Julien A. Bodart, Neil Ross, and Felipe Napoleoni

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Cited articles

Aitken, A. R. A., Young, D. A., Ferraccioli, F., Betts, P. G., Greenbaum, J. S., Richter, T. G., Roberts, J. L., Blankenship, D. D., and Siegert, M. J.: The subglacial geology of Wilkes Land, East Antarctica, Geophys. Res. Lett., 41, 2390–2400, https://doi.org/10.1002/2014GL059405, 2014. 
Ashmore, D. W., Bingham, R. G., Hindmarsh, R. C. A., Corr, H. F. J., and Joughin, I. R.: The relationship between sticky spots and radar reflectivity beneath an active West Antarctic ice stream, Ann. Glaciol., 55, 29–38, https://doi.org/10.3189/2014AoG67A052, 2014. 
Austermann, J., Pollard, D., Mitrovica, J. X., Moucha, R., Forte, A. M., DeConto, R. M., Rowley, D. B., and Raymo, M. E.: The impact of dynamic topography change on Antarctic ice sheet stability during the mid-Pliocene warm period, Geology, 43, 927–930, https://doi.org/10.1130/G36988.1, 2015. 
Austermann, J., Mitrovica, J. X., Huybers, P., and Rovere, A.: Detection of a dynamic topography signal in last interglacial sea-level records, Sci. Adv., 3, e1700457, https://doi.org/10.1126/sciadv.1700457, 2017. 
Beaumont, C., Kooi, H., and Willett, S.: Coupled tectonic-surface process models with applications to rifted margins and collision orogens, in: Geomorphology and Global Tectonics, edited by: Summerfield, M. A., John Wiley and Sons, Chichester, ISBN 978-0-471-97193-1, 29–55, 2000. 
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Short summary
We use radio-echo sounding data to investigate the presence of flat surfaces beneath the Evans–Rutford region in West Antarctica. These surfaces may be what remains of laterally continuous surfaces, formed before the inception of the West Antarctic Ice Sheet, and we assess two hypotheses for their formation. Tectonic structures in the region may have also had a control on the growth of the ice sheet by focusing ice flow into troughs adjoining these surfaces.