530 



INDEX. 



MasnetitB-slate. 52, 190. 194-198, 242. 294. 



(S«i^ ActiiioUtic nlfrte.) 

 Malai'olitie of mira-horiiblpiitli'-syeuite, 115. 

 M.aiiganesp. relation.s to ii-cni (»re. 91-92. 282. 

 Mari-a.site or graywacke. .';;i5, :t;t7. 

 llari-ngo rivei-, 107, 128-120, 138, 17.5. 4711. 

 Marengo river iron range, 217. 

 llari-lli.scan. 473. 



Maniuetto district. .XIII. 2. Ill, 37, .">r>-.'i8, Hi, 2fill, 2fil. 293. 3."iH. 4fil), 

 468, 471-473, 



nnronfbrmitics in, 471, 472. 

 ilarniK'Ite series, relations lo IVnokee serie.s. ,".(i, 470-472. 

 Melaphyre of Keweenaw an, 349. 

 Mellen .jnni-tion, 303, 318, 

 ireoaceanite, alter.ation of, 414, 415, 41*), 



of angite-porphyrile, 415. 



of diabase, 351, 414, 



of gabbro, 351. 



of greenstone-conglonier.ate, 377. 



of iiorublende-gneiss, 120. . 



of porphyrite, 416, 417. 



of scl]iat, 122, 

 Menominee district, 1, 2, 10, 34-36, 37, 260, 261, 293, 356, 472, 473, 

 Menominee river, 81. 

 ^lesabi, Huronian, 2. 

 Mi',sn7,oic. S7. 

 Metaniorpbism, 467-468. 

 Mica from I'elilsjiar, 179, 835-340, 343. 



of biotite-scllist, 339, 340, 341. 



of biotite-slate, 338. 



of granite, 107. 



of graywacke, 304, 307, 334, 336, 337, 338, 



of niica-pyroxene-syenite, 115, 



of micascllist, 308, 309, 345, 



of mica-.-ilate, 308. 30n. 



of Quart7..slate, 148, 149, 151, 179-lW), 468, 



of I'pper slate. 303, 

 Mica-jiyroxeue. syenite. 114-115, 



Mica-schist, 3, 4, 34, 52, 67, 81-85. 152. 302, 303. 332. 344. 345. 388. 

 465. 466, 469, 472, 



described, 307-309. 



foli.-ition of, 308. 



origin of. 77-78,80, 81, 107, 108, 33,">, 339-341. 



relaticnis to gneis-;, 85. 308. 



relations to graywacke, 307, 308. 309. 341, 

 i^en Mica-iiate, BVitite dnti\ Biotitf -schist.) 

 Mica-alate, 3, 52, 84-85, 302, 303, 332, 344, 46:i, 472. 



described, 307-309. 



origin of, 335, 341-343. 



relations to graywacke, 307, 308, 309. 

 (See Mua-schist. Ttioliti'-dalr. ISiolUetchist.) 

 Microcline, alteration of, 335. 



ot' conglomerate, 448, 



ofgranite, lOfi, 112, 123. 



of granitoid gneiss, 123, 



iif graywacke, 333, 335, 336, 



of Qnartz-slate, 150, 



of schist, 118. 



of syenite-schist, 114, 

 Microgranite, crystallization of, 112-11.3. 

 Milwaukee Iron Conipaiiy ]-eferred to, 8. 

 M iner A, Wells option, 191, 2i)6, 

 Minewawa mine, 510, 

 Mining, rnles, for, 276-279. 

 Minnesota, 36, 260, 261, 411, 470, 474. 

 Mississippi iron carbonate. 247. 

 UoQlrcal mine, 269, 370, 



Montreal river, 127, 299, 308, 4,16, 467, 482, .502, .508, 



west branch, 147, lf.1-162, 172, 173, 178. 227, ,369, 418, 

 Montreal river area 6, 7, 10, 11, 12, 15, 17-19, 31, 32, 43, 48, 67. 71, 

 84,111-11,) 115-116, 145,301. 



west hralic.l 84, lOl. 109-111, 121, 129, 144, 146, 304. 328. 329, 

 Mount Uopf mine, 16-i, 231, 269. 270, 272-273, 281. 

 Mount Whittlcse.x , 144, 145, 146. 170, 189,454. 

 ilnrra,\ refuri-eu to. 56, 

 I Muscovit. i'rom feldspar, 305, 333, 334. 335, 336, 337, 338, 339. 



of biotlle-schist, 339, 340, 341. 



of biotite-slate, 339, 



of granite, 106. 



of gT-ay wacke, 30^333, 334, 335, 336. 



of mi(M-.si-hisl,3il7, 308. 



of niii-a-.slate,307, 308. 



Id' Qnartzslatc. 148.151. 



N. 

 Niiugon, 473. 

 Nonfragmental .-lUil fragniental rocks, gradations between, 



246, 

 Nori'ie mine, 84, 92, 273, 277, 281. 

 North lake. 261. 

 Nov.-nulitc, 147, 148, 178, 



described, 154-155. 164. 

 Numakagon lake, 3. 186, 4,56, 460, 464, 468. 

 Nnm.akagon lake area. 9, II, 66. 

 Numakagon river, 104, 457, 469, 470, 



O, 



Ogishki conglomerate, 473, 

 Ohio iron carbonates, 247, 263, 490. 

 Oley, indehtedncss to, .xiv. 

 Oligodasi', alteration of, 335. 



of graywacke, 355. 



of Quartz. slate. 1,50. 

 Olivine of diaba.se, .350. 351, 352. 

 Ontario. 260. 4.69. 470, 473. 

 Ontonagon liver area, 6. 8. 14,30. 

 Ophitic structure of diabase, 350, 351, 410, 

 Ores, (See It-on ore.) 

 i )re veins, number of, 94. 

 Organic matter in iron carbonate, 250, 



in slate, 2.50. 

 Orthoclase, alteralion of, 335, 338. 



of bicdite-.scliist, .340. 



of biotile-slate, 338, 



of gneiss, 109, 123. 



ofgranite. 106, 112,123. 



of gray wai'ke, 333, 335, 336, 



of IJuarlz.-.slale, 1,50, 



of schist, 118, 



of syenite-schist, 114, 

 Owen referred to. 7, 17, 19, 27. 

 Oxide of iron. (Sec Iron oxide.) 



Paint rock, 270, 



(See tSoapetonc ) 

 Paleozoic, 87, 253. 



Palms mine, 164-16,5, 174, 179, 191,2.33.448.449,451,454,471. 

 Paraniorphic amidiiliole, 435, 



hornblende, 3,53, 

 Parker, i-eferred to, 94. 

 IVah-. relViavd lo.2,56. 

 I'cgmalilic structure, 106, 123. 

 Pence mine, 273j506, 



