File:British Antarctic expedition, 1907-9, under the command of E.H. Shackleton - reports on the scientific investigations; geology (1914) (14767733515).jpg

Identifier: britishantarctic11914shac (find matches)
Title: British Antarctic expedition, 1907-9, under the command of E.H. Shackleton : reports on the scientific investigations ; geology
Year: 1914 (1910s)
Authors: Shackleton, Ernest Henry, Sir, 1874-1922
Subjects: Scientific expeditions Natural history Geology Paleontology Petrology Ice
Publisher: London : Published for the expedition by W. Heinemann
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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st two undulations could be distinctly seen, each wave occupying a space oftwo or three miles, but, beyond that, the existence of further waves was onlyindicated by alternate light and shadow, growing fainter in the distance. Scott further says that Armitage reported that, in his shoit sledge journey otabout 12 miles, he crossed four of these undulations. They extended in a generaleast Hnd west direction, and were not in the nature of symmetrical anticlines andsynciines. They presented rather the appearance of a penejilain dissected by broadmature valleys. The general depth of the latter was about 120 feet. Later,Lieutenant Royds, of the same expedition, made a sledge journey over the Barrier,from Hut Point to the south of Mount Erebus, in a general south-east direction,reaching the meridian of 176° E. near latitude 79° 33 S. Scott describes thesurface over which Royds travelled as an unutterably wearisome plain, a surface * The Voyage of Discovery, vol. i. p. 148, London, 1905. 123
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Fig. 46.—Map of Ross Barrier .showing glacier ribs, position of edge of Barritr in Ro.ss time,1841-42, and probable minimum eztension of Barrier northwards, during the maximum glaciation.Amundsens discoveries are added THE ROSS BARRIER 125 such as he describes in his own southern journey. Scotts conclusion that thegreater part of the Barrier is afloat, is based on the following considerations :— 1. When his ship, the Discovery, was lying alongside the Barrier in BalloonBight,* its rail was about level with the Barrier surface there, so that he was in anexcellent position to judge of any differential vertical movement between the shipand the Barrier. Although there was evidence of a considerable tide, ship andBarrier rose and fell regularly together. 2. The soundings, taken by him along the Barrier face, proved that the waterwas too deep to admit of the material of which the Barrier is formed resting on thebottom. For example: at a point at the base of the Barrier cliff, 115 miles

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