298 



INDEX. 



Pennsylvania, Mansfield ore, 98. 

 Nickel, 270. 

 Spathic ores, 87. 



Penokee-Gogebic district, Lake Su- 

 perior, 108. 



Pequest iron belt, New Jersey, 124. 



Perkiomen copper mine, Pennsyl- 

 vania, 153. 



Phillips, J. A., scheme of classifica- 

 tion of ore deposits, 49. 



Phoenix copper mine, Michigan, 141. 



Phosphorus in iron ores, 71, 72. 



Pilot Knob, Mo., 114. 



Bibliography, 118, 119. 



Pima Co., Ariz., 229. 



Final Co., Ariz., 228. 



Pinches and swells in a vein, 37. 



Pioche, Nev., 230. 



Pipe clays in California gravels, 246. 



Pitkin, Colo., 211. 



PiuteCo., Utah, 226. 



Placer Co., Gal., iron ores, 126. 

 Chromite, 261. 



Placers, 243-248. 



Plateau region of Wyoming, 216. 



Platinum, 272. 



Platoro, Conejos Co., Colo., 212. 



Point Orford, Ore., 240. 



Poorman Lode, Idaho. 



Portage Lake, Mich., 141. 



Porter, J. B., cited on Clinton ore, 97. 



Port Henry, N. Y., iron mines near, 

 121, 122. 



Posepny, F. , on origin of ore deposits, 



282, 283. 



Cited on replacement theory for 

 Raibl, 33. 



Prairie region, 9. 



Of Wyoming, 216. 



Prescott, Ariz., 151. 



Prickly Pear Gulch, near Helena, 

 Mont., 221, 245. 



Pride of the West mine, Eagle Co., 

 Colo., 211. 



Prime, F., and Von Cotta, scheme of 

 classification of ore deposits, 

 46, 47. 



Printer Boy mine, T 4 eadville, Colo., 

 183. 



Psilomelane, 262. 



Puget Sound, 238. 



Pumpelly, R., cited on replacement, 



33. 



On subaerial decay, 59. 

 On Keweenaw Point copper 



mines, 142. 



Scheme of classification of ore 

 deposits, 51, 52. 



Putnam Co., N. Y., iron mines, 123. 



Pyrite, 131, 132. 



Pyrite, literature, 132. 



Origin of, 132. 

 Pyrite ore bodies, general relations, 



276. 



Pyrolusite, 262. 

 Pyrrhotite with nickel, 269. 

 Quaquaversal defined, 11. 

 Quaco Head, N. B., manganese, 266. 

 Quebec, bog ores, 279. 



Iron (bog) ore. See Addenda. 

 Quincy copper mine, Mich., 141. 

 Quicksilver (mercury), 267-269. 

 Quogue, Long Island, magnetite 



sands, 128. 

 Radnor ores, i.e., Three Rivers, Can., 



279. 

 Raibl, Austria, silver-lead deposits, 



originating by replacement, 33. 

 Rainbow Lode, Butte, M^nt., 220. 

 Rainier Mountain, 238. 

 Ramapo iron belt, N. J., 124. 

 Ramshorn mine, Custer Co., Idaho, 



223. 



Ranges of ore deposits, 275, 276. 

 Raymond & Ely mine, Pioche, Nev., 



230. 



Raymond, R. W., 277, 282. 

 Red Cliff Eagle Co., Colo., 211. 

 Red Mountain, Mont., 220. 

 Red Mountain, Ouray Co., Colo., 190. 

 Red River region, Kentucky, 77. 

 Red Rock, San Francisco, manganese. 



266. 

 Reese River district, Nev., banded 



veins, 35. 

 Geology of, 232. 

 Replacement of limestone by iron 



ores, 278, 279. 

 Replacement, method of vein filling 



by, 33. 

 Reyer, E., on the Marquette ores, 



106. 

 Rico, Dolores Co., Colo., lead-s.'lver 



mines, 190. 



Riddle, Ore., nickel mines, 271. 

 Rifting in granite at Cape Ann, 



Mass., 12. 



Rim of deep gravels, California, 245. 

 Rio Grande Co., Colo., 212. 

 River gravels, with gold, 243. 

 Roaring Fork Creek, Colo., 188. 

 Robert E. Lee mine, Leadville, Colo., 



183. 

 Robinson mine, Summit Co., Colo., 



186. 



Rockbridge Co., Va., tin, 274. 

 Rock Point, Ore., nickel, 271. 

 Rocks, classification of, 6. 



General percentage of iron oxide, 



72. 



