•■+ 



'■+ 



■•+ 



'■+ 



-■"■+ 



'■+ 



-'•■"'+ 



'■+ 



Figure 12. 



DEPTH TO BLUE HORIZON 

 FROM APPROXIMATE MEAN LOW WATER 



+" 



+" 



+" 



+" 



; ISOPACHOUS MAP 

 SURFACE TO BLUE HORIZON 



+" 



lion InleJ' 



27 



