MANGANESE. 



603 



XXII), and the geologic structure, so far as it can be predicted from present 

 knowledge, is sufficiently illustrated in the hachured map and sections given 

 in Figure 70. 



x e r n a n da^ 

 ^ \\ a^*48wHb!@#?* 



Tics i i ^ w 1 1. v w ,Lnvi» l v 5rc' i •* 



rmfc|£ftAKI 



wait 

 TE 



Q 



g_JL3£LJ 



' B f S 



HOBTZONTA L SCA LE-Mile«. 



Fig. 70. 



Plan and sections along lines Q-R and S-T of map (Plate XXI), illustrating Geology of re- 

 gion about Spiller Mine and Diggings, on survey 764 (Pluennecke), Mason County. 



The manganese belts, omitting for the present the manganiferous iron ores, 

 are somewhat definite geological areas whose relations in structure appear to 

 be very close to the iron ores. But a< careful study reveals peculiarities which 



