Articles | Volume 15, issue 6
The Cryosphere, 15, 2889–2916, 2021
https://doi.org/10.5194/tc-15-2889-2021
The Cryosphere, 15, 2889–2916, 2021
https://doi.org/10.5194/tc-15-2889-2021

Research article 28 Jun 2021

Research article | 28 Jun 2021

Formation of ribbed bedforms below shear margins and lobes of palaeo-ice streams

Jean Vérité et al.

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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.