Figure 3. Transverse profiles of the Fram Strait (2) and subglacial Bentley Channel, West Antarctica (3). Horisontal line (1) stands for present-day sea-level, line (4) - for present ice surface in West Antarctica. Compiled by J. L. Fastook based on existing charts and the data of radio-echo sounding (not published). Note that the present-day ice, covering the Bentley Channel, is more than 4 km thick.