MONOGRAPH XXXVI PL. XLI X. 



ir R 28 W 



< s 



N ^ 



CH MOUNTAIN RANGE 



OLOGY 



a 



R INTEIKAL 20 FEET 



VERTICAL SCALE 1 INCH - 1320 PEET 

 S 600 FEET 



CAMBRIAN 



UPPER HURONIAgr 



ion Undivided 



INTRUSIVE 



Granite 



