i.M>ucii.) ECONOMIC GEOLOGY GOLD. 143 



those of the schists. At that locality tho latter show the usual varia- 

 tions Avitli certain zones; e. //., substitution of hornblende or chlorite f<(r 

 mica. The Vvidth of the vein varies iVoni 2 to 5 feet, as a rule growing 

 wider v/ith increasing depth. Granular <^uartz (!onii)<);',es the gangue- 

 rock. Near the surface this quartz is stained red and brown from the 

 decomposition of pyrite. In certain i)orti<jns of the mine it is Aery nnich 

 shattered and may be easily woi-lced out. Gold occurs free v.ithin th<* 

 "' surface-ores" to a depth of about 80 feet. It is pi imarily contained in the 

 pyrite, but ui)on decomposition cf the latter appeart; native. It occurs 

 partly as line gold, partly coarse, and is found citlicr directly imbedded 

 in the quartz or contained in small cavities. Below the dej»t]i of 80 feet 

 the i)yiite is fresh. Diu-ing 1870 the average yield of ore i^er ton is said 

 t,o have been $75, sometimes running nuich liigher, hovre\er. 



The ore from the Cariso was cruslied in a iive-staiwp mill, located <m 

 Willow Creek, about a mile bcloAv South Pass City. 



Young America. 



A few hundred feet east of the Cariso the Young America is located. 

 It retains the same strike and dip as the former, and appears to be j» 

 continuation of the same vein. A shaft 128 feet in dep/th has been f.unk, 

 and some work was formerly done there. At the time of my visit no 

 Avork had been done for some time, and the mine Vt^as inaccessible. Judg- 

 ing Irom the ore on the dum])s, the gangue-rock consists of (piartz very 

 much splintered. Decomposed" pj'rite produces a red and brown color 

 in it. I Vy'as informed that the ore carried a considerable quantity of sil- 

 ver, and i)aid about $25 per ton. 



Wild Irishman. 



This vein is located a short distance west of the Cariso. It trends in 

 the same direction, and is conformable to the structure of the scliists. 

 At present it is abandoned. It appears that toward the west the vein 

 splits, admitting a horse composed of gneissic and syenitic schist. I 

 could not fully determine whether the Wild Irishman is a continuation 

 of the Cariso, owing to the fact that the surface is obscured and the 

 workings not accessible. 



Some of the lodes in this vicinity, not worked, however, arc the Waah- 

 ington, Grecian Bend, Flora, Duncan, and others. 



Atlantic City is situated on the stage-road from South Pass to Camp 

 Stambaugh. Originally of not as much importance as the former, it 

 has lost less by the decline of mining operations. 



Buclceye Mine. 



This mine is located about a mile to the northwest of the town. It 

 was discovered February 18, 18G7, by "Judge" Lawn. The j^resent 

 owners are Messrs. Lawn, McBiu'k, and Dawlans. The mine is located 

 on the north side of a steep gulch, near the summit of a narrow ri<lge. 

 A partial caving in of the lower drift, and water in the shaft, nuule it 

 im])ossible to \'isit all the worlcings. Syenitic schist is the country-rock 

 striking nearly east and west at this localitj^ The schists are thinly 

 bedded, sometimes contain mica, and then are laminated. Ciu'ves and 

 ramifications are shown in the vein. Its strike is north ,'50° east, neaily 

 at right angles to that of the schists. So far as could be determined, the 



