. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. ark-ably fresh. As weathering, due to the great diurnal changes of temperature, is veryrapid in these regions, the exposure of these rock surfaces through deglaciation musthave been very recent. The direction of the strife pointing towards the end of the Drygalski Ice BarrierTongue is interesting. The striae on top of Cape Irizar trend towards ,and were evidently formed by an ancestor of the David Glacier; while those nearPrior Island trend towards the north-
. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. ark-ably fresh. As weathering, due to the great diurnal changes of temperature, is veryrapid in these regions, the exposure of these rock surfaces through deglaciation musthave been very recent. The direction of the strife pointing towards the end of the Drygalski Ice BarrierTongue is interesting. The striae on top of Cape Irizar trend towards ,and were evidently formed by an ancestor of the David Glacier; while those nearPrior Island trend towards the north-east, and were no doubt produced by anancestor of the Davis Glacier. It is clear that the whole of the island, of whichCape Irizar is the northern end, has been formerly over-ridden by an ice sheet, the COAST BETWEEN CAPE IRIZAR AND THE NORDENSKJOLD ICE TONGUE 67 top of which, at a miuimum estimate, cannot have been less than 1000 feet abovesea-level, where the surface of the piedmont glacier is now only from 20 to about 50feet above sea-level. Rochshoym oansoiacier Prior Island dt + dt bach of t/iii promoneoiy5eeSection t ;. Plateau rocks of MGeorge Murray3600 f« Piedmont oidcierlce SeCTIO\ AT t (abovesketch) Height dbout 150 feu above Sea levelThin Glacier Ice Thin Glacier Ice 40 feec above sea levelVery freshlygidcidted roches moutonneesA few fine pebbles up to 2 inchesin diameter rest on rochesmoatonnees Tioecrach
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Keywords: ., boo, bookcentury1900, booksubjectgeology, booksubjectpaleontology
