Large-Scale Features 



39 



9fl|» 60° 70" 60° 50" 4^ 30* 20» W" ©• 10" 20" 'aO' 



IZCf 110° 100° 90° 00' 70" 60° X°ACf^°2C/'\0° 0° 10° Z(f 30" 40° 50° 60° 



Fig. 14. Depth in hundreds of meters of the 27'6 a-f surface, according to 

 Montgomery and Pollak (1942, fig. 16). 



