SOUDAN FORMATION. 



209 



bay from which the portage leads northward from the lake, exposures of 

 iron formation were found and carefully studied. Here, again, special 



Greenstone 



Soudan formation / 

 (iron-bearing) / 



Scale 



50 100 feet 



Fig. 7, — Sketch showing relations of Soudan formation and Ely greenstone on Jasper Lake. 

 MON XLV — 03 14 



