106 GEOLOGY OF TONOPAH MINING DISTRICT, NEVADA. 



shaft. The south drift was dry. The water here was estimated at one time to be 

 7,000 or 8,000 gallons a day. 



The Belle of Tonopah shaft encountered water along fractures at a depth of 

 150 feet. This was drained, and another water seam was cut at 190 feet. The 

 rock is soft later andesite, very full of pyrite, indicating, as at the Desert Queen 

 shaft, that these waters deposit pyrite. 



The Golden Anchor struck water at a depth of 130 feet and also farther 

 down along fractures. One fracture from which water issued, seen by the writer 

 at 200 feet, was perpendicular, and had a course of N. 70 W. This fracture 

 had been cemented by calcite and reopened. The Silver Top, east of the Golden 

 Anchor, encountered water at a depth of 180 feet. 



The Mizpah Extension encountered water at a depth of 430 feet at the contact 

 of Oddie rhyolite and Tonopah rhyolite-dacite. The water runs on top of 14 feet 

 of wet clay, formed by rock decomposition. The water zone strikes N. 30 W. 

 and dip northeast at an angle of 40. At the time of the writer's inquiry, in 

 November, 1902, the flow was about 300 gallons a day. The shaft was sunk to a 

 depth of 800 feet without encountering any more water. 



The other shafts in the district were quite dry at the time the writer made 

 his observations. Their depths at that time or soon afterwards were as follows: 



Depths of dry shafts in Tonopah district. 



Feet. 



King Tonopah 300 



Boston Tonopah 300 



Behnont 340 



North Star 1,050 



Siebert 938 



Valley View 700 



Stone Cabin 400 



Molly 468 



Montana Tonopah 765 



Midway 635 



Tonopah Extension 485 



MacNarnara 500 



West End 780 



Fraction 400 



Wandering Boy 500 



Tonopah and California 650 



Tonopah City 500 



Ohio Tonopah 756 



BigTono 300 



Fraction Extension 300 



New York Tonopah 745 



a A little seepage along a fault zone at a depth of 720 feet. 



