VALLEY VIEW VEIN SYSTEM. 149 



WANDERING BOY VEINS. 



About 200 feet northeast of the Wandering Boy shaft there outcrop several 

 quartz veins whose position and course, an will be seen on the map (PI. XI), suggest 

 that they form a continuation of the Valley View system. 



RELATIVE ELEVATION OK FAULT BLOCKS CONTAINING VALLEY VIEW AND WANDERING BOY VEINS. 



The veins above mentioned are in earlier andesite, probably in the same fault 

 block as is Gold Hill. That Gold Hill is bounded on the north by a fault is shown 

 by stratigraphic evidence, for the Siebert tuff on the north is in rectilinear contact 

 with the earlier andesite on the south, indicating a very considerable displacement. 

 Along this fault line a valley has been eroded, up which the road runs. The fault 

 block north of this fault is bounded on the west by the Stone Cabin fault, which has 

 an upthrow on the west, bringing up the earlier andesite of Mizpah Hill. There- 

 fore the movement of the Stone Cabin fault compensates to a large degree for 

 that of the Gold Hill fault; and a prolongation of the Gold. Hill fault north- 

 westward between Mizpah Hill and the Wandering Boy finds the earlier andesite 

 corning together and lying on both sides of this prolongation. There is, however, 

 some reason for believing that the fault actually continues along this line, though 

 with much diminished displacement. 



RELATION OK VALLEY VIEW AND WANDERING BOY VEINS. 



According to the tentative conclusion stated in the last sentence above, the out- 

 cropping veins northeast of the Wandering Boy, if they are a part of the Valley 

 View system, are separated by a west- north west fault from the Valley View veins 

 of Mizpah Hill. They are represented on PI. XVII and on fig. 2 (p. 153). The 

 strike is northeast and the dip, like that of the Fraction veins, and unlike that of 

 most of the veins of Mizpah Hill, is to the south at angles of from 50 C to 75. In 

 size and course they are not unlike the westernmost outcrops of the Valley View 

 veins on the western edge of Mizpah Hill, about 300 feet away. The southerly dip, 

 also, is found represented in this portion of the Valley View outcrops, the western- 

 most veins dipping, at the surface, south at angles of from 70 to 80. 



At a depth of a few hundred feet the veins which occur in the Wandering Boy 

 workings, and which are probably identical with those outcropping northeast of the 

 shaft, acquire a flatter dip 30 to -tO c to the south and thus correspond in dip 

 with the vein shown in the Fraction workings. On Mizpah Hill, however, the 

 Valley View veins, at a corresponding distance underground, have a similar dip of 

 about 30 in the opposite direction to the north. The veins in the two localities 

 can not be directly correlated, and their prolongations on a given uniform level 

 underground would be several hundred feet apart, though nearly parallel. 



