Articles | Volume 13, issue 9
https://doi.org/10.5194/cp-13-1269-2017
https://doi.org/10.5194/cp-13-1269-2017
Research article
 | 
28 Sep 2017
Research article |  | 28 Sep 2017

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

Matt O'Regan, Jan Backman, Natalia Barrientos, Thomas M. Cronin, Laura Gemery, Nina Kirchner, Larry A. Mayer, Johan Nilsson, Riko Noormets, Christof Pearce, Igor Semiletov, Christian Stranne, and Martin Jakobsson

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Cited articles

Anderson, J. B., Shipp, S. S., Lowe, A. L., Wellner, J. S., and Mosola, A. B.: The Antarctic Ice Sheet during the Last Glacial Maximum and its subsequent retreat history: a review, Quaternary Sci. Rev., 21, 49–70, https://doi.org/10.1016/S0277-3791(01)00083-X, 2002.
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Basilyan, A., Nikol'skyi, P., and Anisimov, M.: Pleistocene glaciation of the New Siberian Islands e no more doubt, IPY News, 12, 7–9, 2008.
Basilyan, A. E., Nikol'skyi, P. A., Maksimov, F. E., and Kuznetsov, V. Y.: Age of Cover Glaciation of the New Siberian Islands Based on 230Th/U-dating of Mollusk Shells, in: Structure and Development of the Lithosphere, Paulsen, Moscow, 506–514, 2010.
Batchelor, C. L. and Dowdeswell, J. A.: The physiography of High Arctic cross-shelf troughs, Quaternary Sci. Rev., 92, 68–96, https://doi.org/10.1016/j.quascirev.2013.05.025, 2014.
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Short summary
Past glacial activity on the East Siberian continental margin is poorly known, partly due to the lack of geomorphological evidence. Here we present geophysical mapping and sediment coring data from the East Siberian shelf and slope revealing the presence of a glacially excavated cross-shelf trough reaching to the continental shelf edge north of the De Long Islands. The data provide direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum.