404 



5. ./. SHAND 



The following ratio and the corresponding prefixes are simple and 

 expressive: 



Light minerals more th 



Dark 



an 97 per cent 

 90 

 So 



7° 

 Oo 



5° 

 5° 

 60 

 7o 

 So 

 00 

 07 



Ixo or L 



or / 



1;\ 

 It 



or lm 



m s 



nit, \ 



m 7 



m« \ 



m g 



ni„, or M 



or 111 



or «/ 



Examples: L = granite (alaskite); U=syenite; lm=dolerite; m= syenite 



(shonkinite) ; m, = pyroxenite, etc. 



