294 



WEST 



CAINOZOIC PAL.EOGEOGRAPHY 



Fig. a. 



M lOCE N E 

 Dl V I DE 



EAST 



SEA LEVEL (1) 



SEA LEVEU (2) 



POSSIBLE SECTION OF ROSS REGION IN MIOCENE TIME 



FIG.j6. antarctic horst 

 new divide 



OLD 

 DIVIDE 



8,000 FEET : 



LAKE 



SEA LEVEL 



ROSS SEA 



Pf^OBABLE 

 FAULTS/' 



■•'•'•- .-;:■. .,. 



FAULTS 



POSSIBLE SECTION IN EARLY OR MIDDLE PLIOCENE TIME 



Fig. c. 



10000 FEET 



PRESENT 



I CE 

 DIVIDE 



ANTARCTIC HORST 



12.000 TO 15.000 FEET 



'. > 



Fig. 66 



