14 



University of California Publications. 



[Geology 



mountain presents a bold face toward the south, overlooking the 

 alluvium plane below ; and at the base, not near either of the 

 north-south ranges, there are hot springs. At the eastern base 

 of Sing-ats'-e Ridge and about nine miles south of the map PL 1, 

 steam issues from the rocks. In Smith Valley at Wellington, 

 near the eastern base of the Pine Nut Range, is a well the water 

 of which is too warm for drinking purposes; and at the same 

 base, and about twelve miles north of this last place, at Hind's 

 Hot Springs, there is one at scalding heat. Thus, at the base 

 of each of the systems there are hot springs. Wherever the trans- 

 verse system is not present the valleys are closed by an arrange- 

 ment of ridges en ecklon. 



There are several features that are conformable to the two 

 systems within the area mapped and near to it; as for instance, 

 to the transverse system there are the course of the canons, strike 

 of the andesite and rhyolite dykes, strike of the schists, trend of 

 two of the mid-valley buttes and outcrop of several of the min- 

 eral veins. The third butte and the remainder of the mineral 

 veins are conformable to the other system, while the fourth butte 

 is circular, or conformable to both. 



Figure 2. — Ideal representation of the structure of Walker River region. 



Fig. 2 shows somewhat ideally the type of structure that is 

 presented in the region ; and it is believed that this region offers 

 fair opportunities for a quantitative study of the generally rec- 



