. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. 1. THE WESTERN PARTY CAMPED ON THE FERRAR GLACIER ONDECEMBER IS. HANGING GLACIERS ON THE HILLS. Fig. 2. SILL OF QUARTZ-DOLERITE WITH GRANITE ABOVE IT, ANDHEAVY SCREES RESULTING FROM FROST-WEATHERING AT ITS 15ASE [Photo by Sir Philip Brocklehurst [To face p. 254 THE QUARTZ DOLERITES 255 by snow by high-level air currents they would be starved of snow supplies. It isprobable, for reasons already stated, that even when the belt of glaciation hadspread equatorward
. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. 1. THE WESTERN PARTY CAMPED ON THE FERRAR GLACIER ONDECEMBER IS. HANGING GLACIERS ON THE HILLS. Fig. 2. SILL OF QUARTZ-DOLERITE WITH GRANITE ABOVE IT, ANDHEAVY SCREES RESULTING FROM FROST-WEATHERING AT ITS 15ASE [Photo by Sir Philip Brocklehurst [To face p. 254 THE QUARTZ DOLERITES 255 by snow by high-level air currents they would be starved of snow supplies. It isprobable, for reasons already stated, that even when the belt of glaciation hadspread equatorwards to about the parallel of 40° S., as was probably the case inPermo-Carboniferous time, there might still then, as now, be supplies of snow carriedby high-level cyclonic circulation to the South Pole. Tundra conditions would bemost unfavourable to the development of coal, and one must assume that at thetime the coalfields of the Beardmore Glacier were being deposited the climate, thoughpossibly cold, was humid. Rain of course now never falls within this region. Theremust necessarily have been a rainfall, and therefore a more genial climate than atpresent, in order to support the growth of coal-forming vegetation, including
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Keywords: ., boo, bookcentury1900, booksubjectgeology, booksubjectpaleontology
