PLATE XLVI. THE CLIFFS OF THE COAST OF ROSS ISLAND. 



FIG. 1 (Map B). From photographs by C. R. ROYDS (R. m and R. n, 5" x 4" films) ; 

 showing the high rock-cliffs of Cape Crozier. 



FIG. 2 (Map B). From photographs by R. "W. SKELTON (Sk. 57 and 58, ^-plates) ; 

 showing one of the few exposed rock surfaces on the S. side of Ross 

 Island. 



The pictures contrast the marked difference that exists in this high southern 

 latitude between the glacier-covering of the northern and southern sides of such 

 land as Ross Island. In Fig. 1 the cliffs are almost bare of ice and snow. They 

 lie at the foot of Mount Terror, 10,755 feet high, whose slopes at this point from 

 base to summit present certainly more rock than ice. Fig. 2, on the other hand, 

 represents one of the few and scanty rock exposures to be seen on the whole of the 

 southern side. From base to summit the superimposing mountain is completely 

 clothed with ice. The thickness of the ice-cap which falls in avalanches over these 

 cliffs is about 100 feet. Note the irregularities in the surface of the Barrier at its 

 foot, an exact parallel on a slightly smaller scale of the movement chasms met with 

 farther South. (See Plates CVI. and CVII.) 



