INDEX 



295 



Lassens Peak, Cal., 241. 



Last Chance Gulch, near Helena, 

 Mont., 221, 245. 



Lateral enrichments in a vein, 37. 

 secretion, 29. 



Lead City, Black Hills, 217. 



Leadville, Colo., 182-185. 



Figure of Moyer Fault, 17. 



Lead minerals, 156. 

 Statistics, 160. 



Lead-silver ores, 181. 



Leconte, J., on California gravels, 



247. 



On joints, 13. 

 On mercury deposits, California, 



267. 



Scheme of classification of veins, 

 45. 



Lehigh Co. (Penn.) iron mines, 

 magnetites, 125. 



Lenses, or lenticular beds of ore, ori- 

 gin of, 59. 



Lesser metals, 258-277. 



Lesquereux, cited on California grav- 

 els, 246. 



Lewis and Clarke Co., Mont., 221. 



Lewis Mountain, Mo., 116. 



Lime Creek (Colo.) Lower Carbon- 

 iferous fossils, 189. 



Limonite, Arkansas, 289. 



Limonite, deposits of, 73-86. See also 

 under iron ore for geographical 

 distribution. 

 Analyses, 86. 



Lincoln Co., Nev., 230. 



Lincoln Co., N. M.,204. 



Lindgren on Wickes, Mont., 192. 



Lindgren, W., on Calico district, Cal., 



243. 



On Neocene rivers of California, 

 282. 



Linnaeite, 269. 



Little Annie mine, Rio Grande Co., 

 Colo., 212. 



Little Belt Mountains, Mont., 222. 



Little Cottonwood Canon, Utah, 192. 



Little River iron mines, New York, 

 121. 



Little Rock (Ark.) bauxite, 258. 



Livingston Co. (Ky.) lead and zinc 

 mines, 165. 



Uano Co. (Texas) copper mines, 139. 



Logan Co. (Kan.) nickel, 271. 



Lottner-Serlo scheme of classification 

 of ore deposits, 47. 



Longdale iron mines, Virginia, 77. 



Louisa Co. (Va.) mines of pyrite, 131. 



Louisiana lirnonite, 79. 



Lovelock mines (Churchill Co., Nev.) 

 nickel, 271. 



Lovelock, Nev., 259. 

 Lowell (Mass.) nickel mine, 270. 

 Low Moor iron mines, Virginia, 78. 

 Lowville (Lewis Co., N. Y.) lead 



mine, 157. 



Lubeck (Me.) lead mine, 157. 

 Lucky Boy mine, 226. 

 Lyndhurst (Va.) manganese, 263. 

 Lynchburg, Va., iron ores near, 113. 

 Lj^onCo., Nev., 232. 

 Lyon Mountain (N. Y.) iron ores, 120. 

 Mackenzie River, gold gravels, 256. 

 Madison Co., Mont., 219. 

 Magdalena Mountains, N. M., 181. 

 Magna Charta mine, Butte, Mont., 



220. 



Magnet Cove, Ark., magnetite, 280. 

 Magnetite iron ore, 120-131. 



Analyses, 131. 



General description, 120. 



Origin of, 129. 



Origin in igneous magmas, 56. 



Ore bodies, general relations, 

 276. 



Sands, 128. 

 Maine tin, 274. 

 Manganese, 262-266. 



Statistics, 266. 



Mansfield ores, Pennsylvania, 98. 

 Margerie and Heim, cited on faults, 



18. 



Maricopa Co., Ariz., 228. 

 Mariposa Co., Cal., 249. 

 Mariposite, 249. 



Markhamville, N. B., manganese, 266. 

 Marmora, Can., arsenic mine, 260. 



Gold mines, 256. 

 Marquette district. 100. 

 Marshall tunnel, Georgetown, Colo., 



38. 

 Maryland, chromite, 261. 



Clinton ore, 94. 



Gold mines, 252. 



Limonite, 82. 

 Marysvale, Utah, 226. 

 Marys ville, Mont., 222. 

 Massachusetts, lead mines, 157. 



Limonite, 80-84. 



Spathic ore at Gay Head, 89. 

 McGee, W. J., Appomattox and Co- 

 lumbia formations, 5. 



On joints, 13. 

 Meagher Co., Mont., 222. 

 Melaconite, Keweenaw Point, 142. 

 Mendota mines, Keweenaw Point, 



142. 

 Menominee district, Lake Superior, 



107. 

 Mercury, 267-269. 



Mines, California, 275. 



