u 



i 

 1— 

 in 



Q 



69 



71 

 TIME 



CONTOUR : 



1 



(YEAR] 

 MLW 



73 



— o 



LU — 1 



cr 



1— 



O 



69 71 



TIME (YEAR] 



CONTOUR : MSL 



73 



69 71 73 

 TIME (YEAR) 



CONTOUR : MHH 



o 

 o + 



71 

 TIME (YEAR) 



CONTOUR : MHH 



MB 25 



MB 



DISTANCE FROM THE BASE LIME TO STATED CONTOURS 



154 



