MONOGRAPH XLV PL. I 



^lE SUPERIOR EEGIOJSr 



iSr ROCKS 



e, and Canadian surveys 



-y (ironrhecu'uu/, 

 (irorvbearin^ ) 



Penoketi-Gogebtc series (irort-bear'i/u/J 

 ^'--'- '^" sr sc/asts- (iron-be — '-~' 

 Valley gmzrtzites 



(iron-bearing) 



" '■■ -bearing) 



hearing) 



of Canada. 



