136 



GEOLOGY OK TONOPAH MINING DISTRICT, NEVADA. 



east, which seems to grow weaker and tends to disappear in depth. The main 

 workings have been driven on the first vein. 



Much of the ore is of low grade, and not much runs over $100 to the ton. 

 A considerable quantity of moderate grade ore has been found. This ore lies 

 largely in an ore shoot, which pitches steeply east on the vein, and which 

 was followed from near the surface to below the 400-foot level. 



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Fie. 32. Sketch of vertical cut on the east wall of the Silver Top 120-foot level, 3 feet south of mnlii vein, showing 



splitting and reuniting of a minor vein. 



VEINS IN THE SILVER TOP WOKKINOB. 



The Silver Top shaft of the Tonopah Mining Company " starts on the oast side 

 of the Stone Cabin fault, in finely bedded white tuff, striking N. 20- W. and 

 dipping southwest. Below this is the later andesite to the bottom of the shaft, 



There U another Silver Top shaft northeast of the Golden Anchor, as shown In the general r.iap. 



