2 SILVER LEAD DEPOSITS OF EUREKA, NEVADA. 



narrow ridges or spurs which join either the Prospect Mountain ridge on the- 

 west or the main Diamond Range on the east. These spurs are separated 

 from each other by a main canon running from Diamond Valley on the 

 north to Fish Lake Valley on the south. One of the principal of them, ex- 

 tending a little south of east from Prospect Peak, the central and highest 

 elevation of the Prospect Mountain ridge, divides the watershed of the east 

 side of that ridge so that the regions lying to the north and south of the 

 crest of the spur are drained respectively by Diamond and Fish Creek Val- 

 leys. At the northern end of this canon, near its entrance into Diamond 

 Valley, is situated the town of Eureka. Silverado District lies a few miles 

 east of the main cation, in the hills south of the divide, and Secret Canon 

 District on the southern portion of Prospect Mountain, and its spurs west 

 of the before-mentioned main canon. The mines which will be described in 

 this memoir are confined to Eureka District, which includes the northerly 

 portion of Prospect Mountain and its spurs. Of these spurs Ruby Hill is 

 the most important, and Adams Hill, though detached, is also to be regarded 

 as a member of the system. 



Prominent elevations. — Prospect Mountain is a narrow and steep ridge, some 

 seven miles in length, extending from Diamond Valley to Fish Creek Valley. 

 The mountain itself consists of an anticlinal fold which at its greatest ele- 

 vation, Prospect Peak, is 9,600 feet above sea-level, and, with the exception 

 of Diamond Peak, is the highest point in the neighborhood. From this 

 point it descends gradually, forming irregular and rugged peaks, and is lost 

 in the valleys on the north and south. The width of the uplift varies from 

 a mile to a mile and a half, and is greatest in the neighborhood of Prospect 

 Peak. The northern watershed is cut up by three long and deep canons, 

 Goodwin, New York, and the canon which connects with Secret on the 

 southern side of the divide and forms one of the principal canons which 

 empty into Fish Creek Valley. The western slope of Prospect Mountain is 

 very much steeper than the eastern, and is divided into abrupt and rough 

 ridges by short canons which open into Spring Valley. 



Ruby Hill forms the northern spur of Prospect Mountain, but the axis 

 of its fold has a northwest direction from its junction with the main mount- 

 ain. At its highest point it reaches an altitude of 7,300 feet above sea- 



