SCIENTIFIC RESULTS 



113 



The processes of disintefiration are best observed at sea near the 

 southern nieltin<>- end of the berii's journey, and for this reason the 

 ocean south of Newfoundhind provides an excellent region to carry 

 out such studies. 



— - ---51.. 



The Rugged Surface of Recent Cauvings 



Figure 73. — A tower of ice 150 feet high which the international ice patrol observed 

 grounded on the Tail of the Grand Bank in 19i;2. When approached within a mile 

 or less, a berg of this size creates a distinct feeling < f impress! veness. The photo- 

 graph also strikingly reveals the planes of cleavage from which tons of ice have 

 calved. The proportions of exposed to submerged body of pinnacled berg, the 

 group in which this one is classed, is 1:1. (Official photograph, international ice 

 patn I.) 



Meltino; processes are always at work on all bergs, but they 

 are slowest in winter and Avhen the berg is far north or on the conti- 

 nental shelf. AVastage speeds up during the warmer months and as 

 the ice drifts farther and farther soijtii into the open Atlantic. If 

 the water is warmer than the air, a condition sometimes met in early 



