D .. 



59 



71 

 TIME 



CONTOUR : 



73 



(YEAR; 

 MLW 





69 



TIME (YEAR) 

 CONTOUR : MSL 



o .. 



(X 



I— ■+■ 



CO 



1 1 1 



69 71 



TIME (TEAR] 



CONTOUR : MHW 



DISTANCE FROM THE BASE LINE TO STATED CONTOURS AT KB 20 



169 



