CHAPTER XVII. 



FUTURE OF EUREKA DISTRICT. 



Extent cfth, prospect Mountain deposit.— The mining region of Prospect Mountain, 

 comprised between Spring Valley on the west and the Secret Canon road on 

 the east, will no doubt produce large quantities of ore for years to come. 

 As yet a beginning only has been made in the development of the deposits 

 in this portion of the district. It is true that there are several mines, the 

 Hamburg, Ruby-Dunderburg, and one or two others, which have been 

 pretty well opened, though in all of these there is a great deal of ground 

 which remains as yet in a virgin state, but in by far the majority of instances 

 the claims of Prospect Mountain and vicinity have not been explored to any 

 great extent. If the surface geological map is examined it will be seen that 

 the two belts of limestone, which Mr. Hague has named, respectively, the 

 Prospect Mountain and Hamburg limestone, are very wide; and although 

 they cannot be regarded as ore-bearing throughout their whole extent, yet 

 surface explorations have shown that the deposits contained in them are very 

 numerous. Underground developments, as far as they have extended, have 

 also proved that these deposits are continuous to a considerable depth. It 

 is therefore very probable that numerous unexpected ore bodies will be dis- 

 covered throughout this region in the course of future deep-prospecting 

 operations. 



R e,ative si« of the Prospect Mountain and Ruby Hill deposits.— At first Sight UO reaSOll 



appears why as extensive ore bodies should not be encountered in Prospect 

 Mountain as have been found hitherto in Ruby Hill, but a careful exami- 

 nation of the structural features of the two regions leads to the belief that 

 the ore bodies of the former locality will never reach the size of those of 

 the latter. (169) 



