Sea-bed depths at the mouth of Rutford Ice Stream, Antarctica

Seismic measurements of ice- and water column thickness have been made on Rudard Ice Stream where it joins the Ronne Ice Shelf. Assuming that the ice is in hydrostatic equilibrium, these values have been used to calculate sea-bed elevations. A sea-bed trough more than 2 km below sea level along the western margin continues downstream from the grounded to the floating ic