0.30 



0.20 



0.10 



0.00 



May 



M. 



CA 



CB Bl 



1.00 h 



0.90 



0.80 



0.70 



0.60 



0.50 



0.40 



0.30 



0.20 



O.IO^I- 

 0.00 I 



Figure 8. 



Nov . -Dec . 



1974-75 1979-80 





.m 



3 



5 



CA 



CB 



Bl B2 



Stadon 



Graphic comparisons of carbonate percentages for May and November - 

 December between the 1974-75 and 1979-80 collections. 



32 



