294 



INDEX. 



8. Page. 



San Antonio Range, location and origin of 109 



Sarasin and Friedel, experiments by 228-229 



Scarps, rock, origin of 74-79,113-114 



view of 76 



Schaller, W. T., analysis by 88,178 



Scrope, G. P., on volcanic subsidence 47 



Sedimentary rocks, occurrence of 21 



Selenium, occurrence of '. 92, 281, 285 



Sericite, adularia and, relations of 227-228 



alteration of earlier andesite to 207-209 



character of 87 



occurrence of 22 



origin of 22 



Shafts, depth of 106-107 



Siderite, formation of 248-249 



relations of pyrite and 208 



view of 208 



Siebert fault, location of 115-117 



Siebert Mountain, character of 44 



erosion on 113 



events on 67-68 



faulting near 75 



fossils at 69-70 



lava from, analysis of 57, 64 



rocks of 36,40,45,53-55 



section near, diagram showing 53 



veins near 97, 99 



view of 52, 54 



Siebert shaft, depth of 106 



earlier andesite from, analysisof , 216 



description of 213 



study of 217,219-220 



rocks in 116-117 



section on, figure showing 134 



view of 118 



Siebert tuffs, boundaries of 73 



character of 51 



comparison of Pah-Ute Lake deposits and 70 



erosion of 114 



fossils in 69-70 



occurrence of 21, 47-48 



origin of 51-54 



relations of, diagram showing 53 



section of, diagram showing 45 



view of 46 



Silurian rocks, occurrence of 30 



Silver, discovery of 21 



occurrence of 91, 94-95, 123-124, 146, 164, 269, 287 



Silver, horn. Hee Silver chlorides. 



Silver chlorides, character of 88, 91 



occurrence of 122, 180-181 



Silver City, Idaho, ores of Tonopah and, comparison 



of 22,271-274 



Silver Peak, crater at 82,257 



crater at, view of 112 



hot and cold springs at 256-257 



Silver Peak Range, coal in 29 



rocks in 30 



Hilver selenides, occurrence of . . .'. 22,92 



Silver sulphides, occurrence of 22, 88, 94-%, 180-183 



Silver Top sha ft, rocks in 125 



section in, figure showing 136 



veins in 136-137 



relation of Stone Cabin vein and 137-139 



relation of Valley View vein and 139 



water in 106 



Smelting, necessity for 28 



Sodavllle, Nev.. rainfall at 112-113 



Page. 



Solfataras, action of, nature of 260-261 



Spha-riuin idahoense, occurrence of 67 



Spongolithis acicularis, occurrence of 70 



Springs, hot, extinction of 258 



origin of 23,254-2511 



See also Water, hot ascending. 



Steiger, George, analyses by 148, 216, 241 



Stephanite, occurrence of : 22 



Stock, A. C., aid from 198-199 



Stone Cabin fault, extent of 139 



Stone Cabin mine, ore of, character of 136 



oxidation in 91 



sections of 135, 138 



shaft of, depth of lOti 



veins in 135-136 



relation of Silver Top vein and 137 



relation of Valley View vein and 137-139 



figure showing 138 



Suess, E., on underground water 255, 258 



on volcanoes 261 



Sulphide ores, primary, analysis of 89-90 



Sumatra, rocks of 283-284 



Summary of paper 21-23 



T. 



Tellurium, occurrence of iix; 



Temperatures at Comstock and Tonopah, comparison 



Of 265-266 



in the Mizpah Extension 263-264 



in the Mizpah Hill mine 264 



in the Montana Tonopah 264 



in the Ohio Tonopah 263-264 



measurements of, method of 263 



on the Comstock 26n 



relations of depth and 23, 263-26t; 



diagrams showing 265 



Tertiary rocks, character of 31-66 



occurrence of 21, 31-66, 68 



Tertiary time, history in 66, 109-110 



Titanium , alteration of 233-234 



Tonopah, character of 27 



cross section at, figure showing ; 71 



hot springs near 257-25S 



lavas of, succession of 68-9, 274 



location of 25 



name of, meaning of 27 



outcrops at, diagram showing 84 



rocks of, age of 69-72 



view of 27, 46 



Tonopah and California mine, description of 167-168 



fault in 167 



ores of, character of 86 



rocks in 53 



section in 167 



shaft of, depth of 106 



earlier andesite from, analysis of 216,220 



description of 213 



study of 220-221 



section near, diagram showing 40 



veins in His 



Tonopah City shaft, depth of 106,202 



location of 202 



rocks In 37-38,202 



Tonopah Extension mine, discovery of gold in 27 



rocks in 35,181-184 



sections in, figures showing 182, 191 



shaft of, depth of 106 



vcinsin 182-184 



