538 N. L. BOWEN 



reaction series and it was found that there are, toward the basic end 

 of rock series, two fairly distinct reaction series that finally merge 

 into one in the more acid rocks. This was expressed diagrammati- 

 cally as follows. 



TABLE II 



olivines ^ 



^ calclo plagioelases 



Mg pyroxenes g« / 



V calci-alkalic plagioclases 



Mg-Ca pyroxenes / 



\ alkali- calcic plagioclases 



/ 



amphiboles / 



Xalkalic plagioclase 

 "blotites / 



\ / 



potash feldspar 



1 



muscovlte 



I 



quartz 



On the basis of the principles that we have found to govern the 

 behavior of inclusions belonging to reaction series we may deduce 

 with considerable confidence the effects of liquid upon inclusions in 

 this more complex series. 



It may be stated immediately that any magma will tend to make 

 inclusions over into the phase or phases with which it is saturated, 

 in so far as the composition of the inclusions will permit. It may 

 be stated also that any magma saturated with a certain member of 

 a reaction series is effectively supersaturated with all higher members 

 of that reaction series. It cannot, in any sense, dissolve inclusions 



