18 SILVER-LEAD DEPOSITS OF EUREKA, NEVADA. 



amount of faulting movement. It is possible also that the western side of 

 this portion of the ridge has not been tilted to the extent that the eastern 

 has, thereby leaving a broader mass of limestone along the line of the tun- 

 nel. The quartzite must lie at a very considerable distance below the tunnel, 

 but it is possible that the tunnel will strike it as it is driven to the east. 



Distribution of ore in Prospect Mountain. The largest portion of PrOSpeCt Mountain 



and its adjacent spurs is composed of mineral limestone, and evidence of 

 the number of metalliferous deposits contained in it is offered by the 

 numerous outcrops of gossan, which occur along its whole extent, but 

 which are particularly numerous from Ruby Hill to the Secret Canon divide. 

 The mines on both sides of the mountain have produced considerable 

 quantities of ore, and there is every reason to believe that this region 

 when properly explored will produce important quantities for years to 

 come. With the exception of some few mines the properties of Prospect 

 Mountain have been but slightly developed. Those, however, that have 

 been opened to any great extent show that there are numerous masses of 

 ore contained in the Hamburg as well as in the Prospect Mountain lime- 

 stones, and that although no such large bodies as existed in Ruby Hill have 

 been discovered there are many of them. The ore, too, in general is per- 

 haps of a better quality. 



