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Ancient River-Carved Plateaus Mapped Beneath East Antarctic Ice

The formal mapping of ancient river-carved plateaus is now being integrated into ice-sheet models to sharpen sea-level rise projections.

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Overview

  • A Nature Geoscience paper led by Durham University confirms extensive flat fluvial surfaces under 40% of East Antarctica’s 3,500 km coastline.
  • These plateaus formed between 80 and 34 million years ago and have remained largely intact under ice for over 30 million years.
  • Buried plateaus act as barriers that steer fast-flowing glaciers through troughs and slow current ice loss.
  • Researchers will incorporate these subglacial topography features into predictive models to refine Antarctica’s future contribution to sea-level rise.
  • Planned drilling campaigns aim to retrieve rock samples from the hidden landscapes to constrain their ice-free history