140 



PLATE LXXI. A TILTED ICEBERG. 



From photographs by R. W. SKELTON (Sk. 57 and 58, ^-plates), Jan. 1902. 

 (Map A.) 



This berg, which was seen off the Great Ice Barrier, had a height of 150 feet 

 and was tilted through an angle of about 45. The flattened summit now plainly 

 visible from below was at otie time part of the horizontal surface of some great 

 ice-sheet or " piedmont-afloat." 



Ross's Great Ice Barrier has in the last sixty years lost a strip at the edge, 

 400 miles in length at least, and averaging 33 miles in width ; an extent that is 

 of 13,200 square miles of ice with a thickness of over a thousand feet, sufficient to 

 account for a good many icebergs during these sixty years. 



