Hydrology and the Cryosphere
Subglacial sediments: A regional geological template for ice flow in West Antarctica
Article first published online: 7 DEC 2012
Copyright 2001 by the American Geophysical Union.
Geophysical Research Letters
Volume 28, Issue 18, pages 3493–3496, 15 September 2001
How to Cite
(2001), Subglacial sediments: A regional geological template for ice flow in West Antarctica. Geophysical Research Letters, 28: 3493–3496. doi: 10.1029/2000GL011788
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 29 JUN 2001
- Manuscript Received: 16 MAY 2000
We use aerogeophysical data to estimate the distribution of marine subglacial sediments and fault-bounded sedimentary basins beneath the West Antarctic Ice Sheet (WAIS). We find that significant ice flow occurs exclusively in regions covered by subglacial sediments. The onsets and lateral margins of ice streams coincide with the limit of marine sediments. Lateral margins are also consistently linked with fault-bounded basins. We predict that the inland migration of ice streams B and C1 towards the ice divide outside the region covered by marine or rift sediments is unlikely. The subglacial geology has the potential to modulate the dynamic evolution of the ice streams and the WAIS.