206 



TABLE VI 



ANALYSES AND NORMS OF GREENSTONES, 22''N, MID-ATLANTIC RIDGED 



Analyst: Eugene Jarosewich. 



3-6 do not contain as much modal epidote as would be expected from the ACF plot. 

 This is most likely a result of the presence of unreacted relict calcic plagioclase. The 

 lack of correspondence between the modes of these two specimens and the ACF plot 

 is thus a further reflection of the lack of equilibration during metamorphism. 



In order to estimate the extent of contamination by sea water, chlorine was 

 determined turbidimetrically on greenstones 2-5 and 3-6. These gave 0.013 and 

 0.027 %, respectively, suggesting very little contamination. 



