18 



THE CRYSTAL FALLS IRON-BEARING DISTRICT. 



Brooks refers the ore-bearing rocks to the Huroiiiau in the following- 

 words: 



Too little is kuown about the remote Paint River district, iu townships 42 and 

 43, ranges 32 and 33, to enable me to give anything of interest regarding its geological 



^= 



Scale of miles 



Fig. 3 Enlarged reproduction of portion of a geological map of the Upper Peninsula of Michigan, by C. Romii 



T. B. Brooks, and E Pumpelly, 1873. 



structure. The Huronian rocks are extensively developed there, and contain deposits 

 of hard liematite ore. I had the opportunity to examine only two localities at the 

 Paint River Falls, sec. 20, T. 43, R. 32, and sec. 13, T. 42, R. 33, (p. 182). 



