296 



INDEX. 



Mesabi range, Minnesota, 111, 112. 



Metacinnabarite, 267. 



Metamorphic rocks, defined and 



roughly classified, 6. 

 Michigan, copper, 139. 



Gold, 253. 



Limonite, 78. 



Marquette district, 102-105. 



Menominee, 107, 108. 



Penokee-Gogebic, 108. 

 Middletown, Conn., lead mine, 157. 

 Milan, N. H., mines of pyrite, 131. 



Chalcopyrite, 134. 

 Millerite, 269. 



Mine la Motte, Mo., lead mines, 158, 

 159. 



Nickel, 271. 

 Mineral Point, Wis., copper ores, 



164. 

 Mineville, N. Y., iron mines, 121, 



122. 

 Mine waters with dissolved metals, 



40. 

 Minnesota copper mines, 143. 



Limonite, 78. 



Mesabi range, 111. 



Titaniferous ores, 281. 



Vermilion district, 110, 111. 

 Missabe. See Mesabi. 

 Mississippi, spathic ores at Enter- 

 prise, 89. 

 Mississippi Valley, geology, 9. 



Lead and zinc mines, 161. 



Relations of ore bodies, 276. 

 Missoula Co., Mont., 222. 

 Missouri, Cambrian bed hematite in 

 Crawford, Dent, and Phelps 

 Counties, 99. 



Copper at St. Genevieve, 143. 



Iron Mountain, 116. 



Lead mines of southeastern Mis- 

 souri, 158. 



Limonite, 78. 



Lower Carboniferous red hema- 

 tite, 98. 



Pilot Knob, 114. 



Tin, 274. 



Zinc and lead in the southwest, 



166. 



Mitchell Co., N. C., iron mines, 125. 

 Mohave Co., Ariz., 228. 

 Moisie, Can., magnetite sands of, 128. 

 Monarch district, Chaff ee Co., Colo., 



186, 212. 



Monocline defined, 11. 

 Montana, Butte, 136 137. 

 Montana, geology of, 218. 



Iron ore at Great Falls, 74. 



Lead-silver ores, 191, 192. 



Silver and gold mines, 219-222. 



Montana, spathic iron ore at Sand 



Coulee, 89. 

 Tin, 274. 



Montville, N. J., 123. 

 Morenci, Ariz., copper district, 145. 

 Moricke, on gold in Chilean volcanic 



rocks, 25. 



Mosquito range, Colo., 182. 

 In Park Co., Colo., 212. 

 Mother Lode, C,il., 249. 

 Mount Baldy, Utah, 226. 

 Mount Davidson, Nev , 233. 

 Mount Hope, N. J., 123. 

 Mount Marshall, near Georgetown, 



Colo., 214. 

 Mount McClellan, Clear Creek Co., 



Colo., 211. 



Mount Prometheus, Nev., 232. 

 Mount Shasta, Cal., 241. 

 Mule Pass Mountains, Ariz., 148. 

 Mullica Hill, N. J., bog ore with vivi- 



ani'e, 74. 

 Munroe, H. S., citation from, 30. 



Cited on the origin of magnetite, 



130. 

 Scheme of classification of ore 



deposits, 52,53. 

 Musconetcong iron belt, New Jersey, 



124. 



Nacemiento copper mines, New Mex- 

 ico, 227. 

 Nason, F. L., cited on the geology of 



the Highlands, N. J., 123. 

 On geology near Franklin Fur- 

 nace, N. J., 175. 

 On Missouri geology, 282. 

 On Missouri iron ores, 118. 

 Neck of igneous rock defined, 11. 

 Neihart. Mont., 222. 

 Nelson Co., Va., tin, 274. 

 Neocomian beds, California, 267. 

 Nevada, antimony, 259. 

 Geology, 230. 

 Lead-silver mines, 196. 

 Lovelock nickel mines, 271. 

 New Almaden, Cal., mercury, 267. 

 Newberry, J. S., cited on the Cave 



Mine, Utah, 195. 

 On Clinton ore, 97. 

 On Silver Reef, Utah, 226. 

 Scheme of classification of ore 



deposits, 48, 50. 

 Newberry, W. E., cited on Aspen, 



Colo., 188, 190. 

 New Brunswick, antimony, 259. 



Manganese, 266. 

 New Brunswick, N. J., copper mines, 



153. 



Newburyport, Mass., lead mine, 157. 

 New Caledonia nickel, 271, 272. 



