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THE VERMILION IRON-BEARING DISTRICT. 



THE ELY IRON-ORE DEPOSITS. 

 DEPOSITS OCCURRING AT THE BOTTOM OF THE IRON-BEARING FORMATION. 



To this group belong the deposits occurring near Ely, now worked by 

 means of the shafts of the Chanrller, Pioneer, Zenith, Sibley, and Savoy 

 mines. The particular deposit upon which the Chandler and Pioneer mines . 



Fig. 8.— Vertical section across Chandler ore body along line E-F oJ fig. 9. 



are working will probably prove to be one of the largest continuous bodies 

 in the Lake Superior region (PI. VIII). This particular ore body affords so 

 perfect a confirmation of the law of the occurrence of ore deposits as stated 

 by Van Hise that it is of very great scientific as well as economic 

 importance, and will therefore be described in some detail. 



