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GEOLOGY OF TONOPAH MINING DISTRICT, NEVADA. 



50 E. On the 300-foot level east the vein is likewise cut off by a broken and 

 fractured zone, with finally a .straight slip face running N. 28 E. and dipping 

 steeply east. These occurrences on the two levels represent probably the same 

 general fault or fault zone. This fault, which may be called the Valley View 

 fault, is therefore approximately parallel in strike and dip with the Stone Cabin 



Valley View shaft 



LATER ANDESITE Siebert shaft 



Flo. 30. Vertical section on plane of Siebert and Valley View shafts. 



fault, which bounds, on the east side, the earlier andesite of Mizpah Hill, and 

 separates it at the surface from the tuff formation (Siebert lake beds) on the west. 

 The Stone Cabin and the Silver Top workings, therefore, are on the east side 

 of the Valley View fault, or between the Valley View and the Stone Cabin faults, 

 while the Valley View workings are on the west side of the fault of the same name. 



