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Results of seismic surveys carried out on the Ross Ice Shelf, Ross Sea, Antarctica, as part of the Ross Ice Shelf Geophysical and Glaciological Survey (RIGGS).
Measurements of the concentrations of Na(+), K(+), Mg(2+), and Ca(2+) were made on 28 samples from the 255-m-deep ice core from Little America V. All concentrations decrease sharply with depth from the firn-ice transition at 52 m to somewhere between 125 m and 150 m. From 150 m to 250 m the cationic concentrations are relatively constant. This is interpreted to indicate that the ice above 125 m fell as snow on the Ross Ice Shelf and that ice below 150 m originated inland on Marie Byrd Land. (Author).
The geoscientific results of the Victoria Land Traverse, 1959-60 are presented with interpretations and conclusions. The major geographical discoveries, the Arctic Institute Range and the Rennick Glacier, are treated and descriptions and locations given. The presence of a vast ice thickness, which in many cases exceeds 2.0 km. is reported covering Victoria Land and is shown to conceal a major subglacial depression. Subglacial rock topography influences the relief of the ice surface of Victoria Land as seen upon comparison of seismic and altimetric results. The presence of prolonged seismic surface noise is reported and attributed to low temperature phenomena. (Author).