MINERALS. 713 



Brown (red) oxide of copper is found in the Boracho Mountains and 

 in some prospects in the Big Gulch district of the Quitman Mountains. 



Peacock ore and pyrites of copper are found in many prospects of the 

 Carrizo Mountains, in the prospects of the western side of the Quitman 

 Mountains, and in the mountains between the Sierra Blanca group and 

 the Hueco range. 



Chrysocolla, and also atacamite, are found in the foothills of the 

 Sierra Diabolo. 



Pseudomalachite (ehlite, dihydrite), occurs in the prospects on the 

 hills west of Sierra Blanca Junction. 



Manganese, as wad, psilomelane, lampadite, and crednerite (manganese and 

 copper) crops out in the prospects west of the Sierra Blanca; also in 

 the prospects of the Hunter district, on the Quitman Mountains, where 

 also pyrolusite (gray oxide of manganese) exists. 



Silver (native). 



Silver sulphides and chlorides are worked in the Shafter mine in the 

 Chinatti Mountains, and also in the Hazel mine in the Sierra Diabolo 

 Mountains. 



G-old. is found in traces with most of the copper ores of the Carrizo Moun- 

 tains and with some of the ores of the Quitman Mountains. It is also 

 found in the gravel hills near the Rio Grande, between the Quitman and 

 Eagle mountains, and in float found north of Finlay. 



Tin. 



Traces of tin were found in material from prospects in the Quitman 

 Mountains, and Platinum, in traces, in a decomposed rock from the west 

 side of the Quitman Mountains. 



Quicksilver Ore (cinnabarite) is said to exist in one of the mountain ranges 

 north of the Sierra Carrizo and the Bofecillos, but in spite of my careful 

 examination of the float I have not found any traces of this metal up to 

 the present time. 



