202 







PLATE GIL MORAINE-HEAPS ON FLOATING GLACIER-ICE. 



Fig. 1 (Map B). From a photograph by R. W SKELTON (Sk. 236, J-plate), Dec. 

 1902 ; taken off the west coast of M'Murdo Sound. 



FIG. 2 (Map B). From a photograph by R. W. SKELTON (Sk. 235, ^-plate), Dec. 

 1902 ; taken at the same place. 



At the head of M'Murdo Sound and on its western side, there is an immense 

 quantity of morainic material on floating but almost stationary glacier-ice. The 

 moraines occur in long trains of cones, which often rise 50 feet above the level of 

 the ice, and sometimes even to 150 and 200 feet. Some of the ice is apparently an 

 overflow from Ross's Barrier ; some in Discovery Gulf is discharged, with much 

 rock and debris on its surface, from Kcettlitz Glacier. 



It is often difficult in these masses to say what part of the material is rock 

 debris and what is ice. During summer, the fine material is constantly being 

 separated from the coarser, by water from the melting ice. 



In some cases the cloak of debris is too thick to allow of any melting under- 

 neath, and the ice is then preserved indefinitely. 



Ferrar, Nat. Hist. Rep., vol. i., pp. 14, 20, 81 ; see also Figs. 1 and 2, Plate 

 CL, which illustrate parts of the same. 





