. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. 1 -tsta^. Fig. 2 \Tofacep. Ml ICEBERGS AND SNOW BERGS 173 Drygalski Ice Barrier as against many snow bergs. This seems strange when oneconsiders that an immense proportion of the west coast of Eoss Sea and McMurdoSound is occupied by piedmont ice. At the same time it must not be forgotten thatthis piedmont ice or shelf ice closely approximates in places to the structure of thesnow bergs formed by accumulations of old snow on sea ice of many seasons
. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. 1 -tsta^. Fig. 2 \Tofacep. Ml ICEBERGS AND SNOW BERGS 173 Drygalski Ice Barrier as against many snow bergs. This seems strange when oneconsiders that an immense proportion of the west coast of Eoss Sea and McMurdoSound is occupied by piedmont ice. At the same time it must not be forgotten thatthis piedmont ice or shelf ice closely approximates in places to the structure of thesnow bergs formed by accumulations of old snow on sea ice of many seasons bergs as were formed of blue ice, and were more or less charged with rock dustand other rock debris, had probably been derived from the snouts of some of theoutlet glaciers of the Antarctic, or from the foot of the piedmont. Near the finalstage of their history, before they disappear, the snow bergs with their foundationof old sea ice are gradually eroded away by the mechanical force of the breakingwaves, and at the same time become thawed in the rays of the sun, until at lastnothing is left but what appears to be a perched block of old s
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Keywords: ., boo, bookcentury1900, booksubjectgeology, booksubjectpaleontology
