INDEX. 



289 



Canso, N. S., 255. 



Cape Breton, N. S., manganese, 266. 



Capelton, Quebec, mines of pyrite, 



131; chalcopyrite, 134. 

 Carbonate Hill, L^adville, Colo., 183. 

 Carbonate mine, Utah, 195. 

 Carpenter, F. E., on the Black Hills, 



S. D.,217. 



On Black Hills tin, 274. 

 Carson Hill, Calaveras Co., Cal., 248. 

 Cartersville, Ga., manganese, 263. 

 Cascade Mountains, 238. 

 Cascade Range, Cal., 241. 

 Cassia Co., Idaho, 223. 

 Casbiterite, 273. 



In granite veins, 60. 

 Cave mine, Utah, 195. 

 Caves, origin of, 21. 



As a form of ore body, 57. 

 Cave Spring manganese mines, Geor- 

 gia, 263. 

 Cazin, F. M. F., on Silver Reef, Utah, 



226. 



Cedar Mountain, Mo., 116. 

 Central City, Colo., copper mines, 



138. 

 Chaff ee Co., Colo., 212. 



Magnetite, 126. 

 Chalcopyrite with pyrite, 134-136. 



Literature, 135. 

 Chamberlain, S. C., on Wisconsin 



lead and zinc mines, 161-163. 

 Chambered vein, 267. 

 Charlemont, Mass., mines of pyrite, 



131. 



Charles Dickens mine, Idaho, 223. 

 Chatham, Conn., nickel mine, 270. 

 Chateaugay iron mines, New York, 



72, 120. 



Chaudiere River, Canada, gold, 256. 

 Chauvenet, R. , cited on Colorado iron 



ores, 126. 

 Chester, A. H., on the average yield 



of certain well-known iron 



ores, 71. 



Chicago Coppermine, Arizona, 150. 

 Chico beds, California, 267. 

 Chimney of ore, 37. 

 Chromite distribution, 261. 

 Chromium, 261. 



Mines, California, 275. 

 Chug water Creek, Wyo., iron ores, 



126. 

 Church, J. A. , on the Comstock Lode, 



233, 234. 



Churchill Co., Nev., 232. 

 Chute of ore, 37. 

 Cincinnati uplift, 9. 

 Cinnabar, 267. 

 Classification of ore deposits, 42-62. 



Classification of ore deposits, under- 

 lying principles, 42. 



Wadsworth, 278. 

 Clay ironstone defined, 86. 



Deposits of, 86-88. 

 Clay selvage, seam, or parting, 37. 



Attrition clay, 37. 



Residual clay, 37. 



Clayton, J. E., on Butte, Mont., 220. 

 Clayton's law, 37. 



Clear Creek Co., Colo., 211, 212, 214. 

 Clear Lake, Cal., mercui'3 T , 267. 

 Clerc, F. L., cited on zinc mines of 

 southwestern Missouri, 167-170. 

 Cliff copper mine, Michigan, 141. 

 Clifton, Ariz., copper district, 145. 

 Clinton ore, 92-98. 



Distribution, 92-97. 



Origin, 97. 



Clinton ores, general relations, 276. 

 Coal measures, classification of in 



Pennsylvania, 87. 

 Coastal Plain, 252. 



Geology, 8. 



Topography, 6. 

 Coast Range b*-lt of mines, 275. 



Chromite, 261. 



Oregon, 39. 



Washington, 238. 

 Cobalt, 262. 



Cochise C->., Ariz., 229. 

 Cceur d'Alene, Idaho, lead-silver ores, 



192. 



Col fax Co., N. M, 204. 

 Colombia, platinum, 272. 

 Colorado, geology, 204. 



Iron (bog) ore, 74. 



Lead-silver mines, 182, 191, 275. 



Limonite, 79. 



Magnetite, 126. 



Literature, 126. 



Plateau, 7-9. 



Silver and gold, 205-216. 



Spathic iron ore, 89. 



Titaniferous ores, 281. 

 Columbia Co., N. Y., lead mines, 157. 

 Columbia Hill, gravels, California, 



245. 



Comb-in-comb structure in a vein, 35. 

 Comstock Lode, Nev., 233-237. 

 Comstock, S. B., on Red Mountain, 

 Colo., 190. 



On vein systems of the San Juan, 



206. 



ConejosCo., Colo., 212. 

 Connecticut, bismuth, 260. 



Lead mines, 157. 



Limonite, 80, 85. 



Magnetite sands, 128. 



Roxbury siderite, 91. 



