. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. -2. WEATHERED BOULDER OF KEXYTE ON FOOT-HILLS OF ]\[OUNT EREBUS, NEAR (JAPE BARNEBoulder about 7 feet in diameter Fig. 3. WEATHERED CONCRETIONS OUT OF THE BEACONSANDSTONE, FROM SCREE, KNOB HEAD MOUNTAIN,FERRAR GLACIER VALLEY [To face p. 194 DENUDATION 195 fell directly on the moving ice face, high screes of detritus were piled. These screesin some cases must have reached two or three thousand feet in height, and practi-cally the whole of the material of the up
. British Antarctic expedition, 1907-9, under the command of Shackleton : reports on the scientific investigations ; geology. Fig. -2. WEATHERED BOULDER OF KEXYTE ON FOOT-HILLS OF ]\[OUNT EREBUS, NEAR (JAPE BARNEBoulder about 7 feet in diameter Fig. 3. WEATHERED CONCRETIONS OUT OF THE BEACONSANDSTONE, FROM SCREE, KNOB HEAD MOUNTAIN,FERRAR GLACIER VALLEY [To face p. 194 DENUDATION 195 fell directly on the moving ice face, high screes of detritus were piled. These screesin some cases must have reached two or three thousand feet in height, and practi-cally the whole of the material of the upper portion of them must have been derivedfrom the frost-weathering of the cliff faces, for in such situations the action oftorrential water must be negligible. The lower portions of these screes contain largequantities of rock which cannot have been derived from the cliffs above them, andmust be the material which formed the lateral moraine of the glacier at a formermore extensive phase of glaciation. A jjhenomenon due to sudden change of temperature was observed during ourstay at the Christmas Camp below Knob Head Mountain
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Keywords: ., boo, bookcentury1900, booksubjectgeology, booksubjectpaleontology
