160 



THE YRETEVA 



is located opposite the Highland Mary, on the east side of the gulch. 

 It strikes a few degrees more to the west than the latter, and has the 

 schists as wall on either side. Farther down the caSon, on Green Mount- 

 ain, the 



GKEEN MOUNTAIN LODE 



is situated, striking almost north 45° west. Low^er down it runs 

 through the schists, cutting the strike of the latter at an angle of about 

 80°. It continues upward through them, and enters the trachyte, 

 without showing any perceptible change of course. The ore of all the 

 lodes in Cunningham Gulch are of the same mineralogical character, 

 notwithstanding the quantity and distribution of each specific mineral 

 may frequently vary. 



THE PEIDE OF THE WEST 



is also located on Green Mountain, and has an approximate course of 

 north 45° west. Though it cannot with certainty be said to reach 

 down into the schists, this yet appears very probable. Three hundred 

 feet above the Pride of the West is the Equator: 150 feet below, the 

 Astor; both running nearly parallel with the first. 



Besides these, there are a number of other lodes on the Cunningham 

 already claimed, but it was impossible to obtain notes on them all, 

 inasmuch as the inspection of each would require nearly an entire day. 

 This latter fact is owing to the distance at which the mines are located 

 from any available camping-place, and from the fact that, besides being 

 far apart, they are mostly at a considerable elevation above the creek. 



We have in the Cunningham a series of silver lodes, which, so far as 

 surface-indications may be relied upon, do not change the character of 

 their ore when leaving the one and entering the other geognostic forma- 

 tion. At another locality, of which mention shall i>reseutly be made, 

 veins containing gold-ores are found. Higher up the mountains veins 

 appear, carrying very small quantities of this metal, but showing spe- 

 cific silver minerals. 



In Arastra Gulch, about two and a half miles down the Animas from 

 Howardsville, at the mouth of Cunningham, gold-mining was carried on 

 first. The gold was washed out by various methods, until the "Little 

 Giant " was discovered. This discovery led on to prospecting, and after 

 some time a large number of veins had been found and claimed. In 

 former times the settlement there was one of good promise. It decreased 

 after the abandonment of gulch-mining, but, under the influence of these 

 newly-discovered silver lodes, is again reviving. Although I spent as 

 much time as I could upon the decision of the question whether the 

 metamorphic rocks underlied the trachytes containing the lodCvS, I 

 could find no point where a satisfactory outcrop occurred. Judging, 

 however, from the close proximity of these rocks, from their trend toward 

 the region under consideration, and from the fact that the ore of the 

 Little Giant is associated with chlorite, being one of the lowest mines in 

 the gulch, I think it highly probable that they do extend through and 

 that the veins probably run through into them. The veins observed on 

 the higher i)ortions of the mountains forming the walls of the short caiiou 

 run in trachyte, belonging to JSTo 4, have as a rule a course of east 10° 

 to 50° south. A number of veins occur that vary from this, but the 

 majority preserve a parallelism among themselves. At the same time 

 they show no material deflection from the course of neighboring veins. 



