116 University Geological Survey of Kansas. 
in 
Fig. 7. Map showing underground workings, Battlefield tract, Galena. 
flint area, and the Mastin land is over to the west side. But 
in the central area we have the rich deposits under the south- 
ern part of the city of Galena, with the Battlefield land and 
other properties which have produced enormous amounts of 
ore, all of which imply that the ore bodies are situated in 
positions such that it is impossible to connect them with any 
general fault or fissure zones. But if we assume, as has been 
explained in chapter V, that faulting and fissuring have 
been produced largely by the action of earth movements 
breaking the brittle flint irregularly, and this breaking per- 
mitting the water to dissolve out associated limestone, by 
which there would be a contraction sufficient to account for 
local faults, then the faults and fissures would be confined 
principally to the flint beds themselves and at the same time 
might have no regular positions or directions. 
Likewise, the circular or curved lines connecting ore bodies 
so frequently noticeable, particularly in Missouri, and re- 
ferred to by Bain,* at once become easily explainable. These 
flint areas usually are somewhat globular in shape as best 
we know them and, therefore, fracture lines and vertical dis- 
* Loc. cit. 
