F THE 



N WALKER 



VOL. 4, PL. 1, 



LEGEND 



SUPERJACENT SERIES 



Sb 



Basalt 



Stb 



Andesite Tuff 

 and Breccia 



Later Andesite 



fill 



Tertiaru 

 Sedimentaries 



Sr 



Rhyoliie 

 and Rhuolite Tuff 



Earlier Andesite 

 BEDROCK COMPLEX 



Bp 



Porphyriie 



Bgp 



Granite rorp'hi/ry 



Bg 



Granite 



Schist 

 Bh 



"Shale 



Bl 



/ 



Dike 



Schisted Dike 

 / 



Iron Ore 

 Ore Deposits 



Numbers de- 

 scribed in text 



> 4 



Geology by D. T. Smith 



