10 



THE ROSS SEA AND McMURDO SOUND 



M<= M U R D O 



l0 7Sfm3 



Cape Royds 



^*69Siis 





SOUND 



ift»>^ 



S SEA 



o Beaufort I. 



^iiotw 



M3(«0 V'»" 



showing line oF Section 



CCOCRAPHICAL K/tlt-CS 



lO 5 O 10 



1 I I I I I I I I I I I 



so 



■-->?«! 



HOfll20NTAL SCALE OF GEOGRAPHICAL UllEA. 

 10 S to so 30 



M*Oavioson 



1003.166*1 



UnjiWE 



long IS3t 



Figs. 1 and 2. SECTION ACROSS McBIURDO SOUND 



Looking south, showing coastal platform on right, and rapid 



descent of sea floor to depth of 360 fathoms. 



A third possible explanation of the shallowing of McMurdo Sound towards the 

 centre is that it is the result not of addition of morainic or volcanic material, but of 

 differential erosion. In this case it may be suggested that deeper hollows have 

 been scooped inshore, where the thrust and consequent erosive power of the former 



