BATTLE MOUNTAIN'S. 669 



15° west, the beds dipping at a high angle, and near the head of the canon 

 are much disturbed, and give evidence of having undergone considerable 

 displacement. All the beds are highly siliceous, and are characterized by 

 a bluish-black cherty quartzite having a conchoidal fracture and resiuDus 

 lustre. They closely resemble similar beds, already described, from the 

 Shoshone Range, in the region of Ravenswood Peak and Reese River Canon, 

 which were also referred to the Weber Quartzite. 



The third ridge forming the western slopes of the mountains is much 

 broken up by rhyolitic outflows, which have not only disturbed the strata 

 through which they penetrate, but have in a measure concealed them below 

 the heavy accumulations, thus destroying the continuity of the formations. 

 The beds, which have a general strike of north 15° west, with a dip of 40° to 

 50°, consist of dark bluish-gray quartzitic schists and slates more or less 

 argillaceous, of a compact texture, and usually thinly bedded. In the canon 

 directly west of Antler Peak and north of the large rhyolitic mass, these 

 beds are well exposed, forming high abrupt walls, with a strike of north 15° 

 to 20° west, and a dip of 35° to 40°. A specimen from these quartzitic 

 beds, subjected to analysis by Mr. R. W. Woodward, yielded the following : 



Silica----- ...: ------ 75.32 



Alumina 15.19 



Ferric oxide — 3.30 



Magnesia 2.41 



Soda 0.31 



Potassa 0.22 



Waler 1.98 



98.73 



Overlying the quartzites occurs a narrow belt of dark-gray limestone, 

 extending down to the Quaternary plains. A diligent search was made for 

 organic remains, but without success. 



Antler Peak is formed entirely of Carboniferous limestones. It occu- 

 pies a somewhat singular position at the head of Willow and Duck Canons, 

 but its true relations with the surrounding quartzites were not clearly made 

 out. All the limestone beds are inclined invariably to the westward, although 



