Abstract
The results of seismic measurements made during the Antarctic Peninsula over-snow traverse of 1961–1962 are presented and discussed. Maps of snow surface and bedrock elevation are presented. The Antarctic Peninsula is shown to be an island separated from the Sentinel Range by a channel 1000 m below sea level and from the Eights Coast of Ellsworth Land by a channel 500 m deep. A reflection horizon 450 m above the base of the ice near Eights Station was observed. Wide-angle reflections showed the existence of a low-velocity layer below this reflecting horizon which is interpreted as the result of moraine within the ice. An 18-km refraction profile showed a velocity of 3.87 km/sec in the top 0.9 km of ice, a velocity of 4.39 krn/sec in the next 0.2 km, a velocity of 5.29 krn/sec in the next 3.5 km, and a possible velocity of 6.0 km/sec in the rock below.
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