CLA SSIFICA TION OF IGNEO US ROCKS 625 



tion and the actual, there is obviously no need of mentioning 

 details of the actual mineral composition, since this is fully 



CLASS V, PEF 



SECTION 



n , r> CaO + MgO + FeO 



Rang i, Permirlic, \, *L ^ 



Na 2 



c .. -n . . MgO + FeO. 7 



Section 1, Pennine, _, ' >- . . 



CaO 1 



Subrang 1, Permagnesic, ^ e >-. , 



Subrang 2, Domagnesic, V^<-> 

 FeO 1 ^ 



Subrang 3, Magnesiferrous, —^ < 

 Subrang 4, Doferrous, ^pr<->-. 



reU 5 7 



Subrang 5, Perferrous, ~^- <-.... 



reU 7 



Section 2, Domiric, Me °+ Fe ° < Z > g 

 CaO 13 



Subrang 1, Permagnesic, -rr=k->-. . 

 s ' FeO -^ 1 



Subrang 2, Domagnesic, <->-... 

 Subrangs 3, 4, and 5 not represented 



