04 November, 2018 by Nicholas O'Flaherty
One of the highest tidal ranges in Antarctica is 5 meters, but it occurs far from open water, beneath the Ronne-Filchner Ice Shelf. Where the Foundation Ice Stream meets the shelf, the grounding line is located 2km below sea level. With each tide, the grounding line oscillates 20km back and forth along the bedrock.
More information in Nature