Articles | Volume 15, issue 6
https://doi.org/10.5194/tc-15-2889-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-2889-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
28 Jun 2021
Research article |
| 28 Jun 2021
| 28 Jun 2021
Formation of ribbed bedforms below shear margins and lobes of palaeo-ice streams
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
Édouard Ravier
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
Olivier Bourgeois
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Université de Nantes, 2 rue de la Houssinière, BP 92208, 44322
Nantes CEDEX 3, France
Stéphane Pochat
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Université de Nantes, 2 rue de la Houssinière, BP 92208, 44322
Nantes CEDEX 3, France
Thomas Lelandais
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
Régis Mourgues
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
Christopher D. Clark
Department of Geography, University of Sheffield, Sheffield, UK
Paul Bessin
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
David Peigné
Laboratoire de Planétologie et Géodynamique, UMR 6112, CNRS,
Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9,
France
Nigel Atkinson
Alberta Geological Survey, 4th Floor Twin Atria Building, 4999-98
Ave., Edmonton, AB, T6B 2X3, Canada
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Short summary
Subglacial bedforms are commonly used to reconstruct past glacial dynamics and investigate processes occuring at the ice–bed interface. Using analogue modelling and geomorphological mapping, we demonstrate that ridges with undulating crests, known as subglacial ribbed bedforms, are ubiquitous features along ice stream corridors. These bedforms provide a tantalizing glimpse into (1) the former positions of ice stream margins, (2) the ice lobe dynamics and (3) the meltwater drainage efficiency.
Subglacial bedforms are commonly used to reconstruct past glacial dynamics and investigate...
