F)2r, 



INDEa 



Dikes, relations to quartzite, 272, 274. 



relations to sliat't, 277, 278. 



thiekuess of, 27:j. 

 Dikeiock, relation to iron ores, 92, 274-275, 276, 277, 287. 289i 



290,291,292, 29.''., :i05. 

 Hloril., 12, 52. 



IVoni lUaltiise. 1155. 



I'rom Iron-b(^arix)g member, 271. 



oT Keweeiiawan, :i49. 

 Hioi-ite-imrpliyT-ite, ;i7l>, * 



Dicoilierorkn. 117. 09. 

 l>i|.or,lay.slale, 4:14. 



..!' dikes, 2T2, 27.'i, 278, 279. 



c>t'*|Mart/.it« 270. 



of slate, 427-428. 

 l»i|ipin;^ needle, .52. 

 lioloniite, ilescribcil, Wri-i:!7, 480. 



orebcrt.133. 



ol' i;ra,v\\ acke, ;!33, .'WO. 



of limcstoi^e, l:iO, 131, 132. 

 Drifts iiriron on;, 278. 

 Dnliilh sal'bro, 37, 81. 

 DnuikoHski, von, referreil to, 140,251. 



E. 



Eakins, analysis b,v, 30G. 

 Eastern area, 360-436, 456, 467, 518. 



iron o?-e of, 365, 366. 

 Eastern area rocks, relations to eherty limestone, 422, 423. 



reiatitnis to eastern sandstone. 431. 



relatifins to greenstone range, 422. 

 Eastern sandstone. 434, 4:J6, 467. 



relations to eastern area roeka, 431. 



relations to gneiss anil granite. 389. 



relations to Ke\\-eena\van, 47, 461-463. 466. 



relations 111 renokr'Cieries. 12. 361. 461-463, 466. 



relations to Sontbern Complex. 461-463. 

 (See Lak'r Supi'rior MUmlifonf.) 



uneonforniity below, 388,461-403. 

 Emmons (E.) referred to. 79. 

 Emmons, S. F., on lead ores. 293. 

 England, chert of, 251, 252. 

 English lake, 7, 30(1, 301, 303, 309, 459. 

 English lake area, 8, 17-19. 

 Enlargement of angite,86, 353, 411. 

 Enlargement of feldsjiar, 180. .395, 409, 

 Eidargeini'nt "I hornblende, 8li. 353. 410. 411. 

 Enlargenii'nt of i|uart/., 112, 132, 1.50. 152. 15.3, 180, 185, 209, 267, 



288. 305. 331, 335, 330. 343, 315. 377, 395. 396, 444. 468. 

 linvinnimeut. etfeet of, on decom position of rock. 358, 359. 

 Epidosite. 119. 

 Ei>idote aniygdules, 377. 

 Epidote. from ehlorili'. 3,53, 414, 415. 



from feldspar. 118. 413, 414,417, 418. 



of angite porphyrite. 415. 



of gneiss, HIS, 109. 111. 116,118,119. 



of greenstone eonglonierate, 375, 376, 377. 



of jtorpbyrile, 417. 

 Epidote gneiss, 116. 

 Epidole vi-ins, 418. 

 Erniitives, 346, 359, 364, 365, 374-387, 410-419. 



of Iron bearing nreniber, 271-274. 



relatirnis to aetiuolilic-slate. 259. 



relations to greenstone conglomerate, 374. 



relations to Iron-bearing member, 346, 361, 



relations 10 r ppur slate, 347. 348, 358. 



i FaMll at Had river, 26, 77. 188. 438-UO. 

 I at Potato river, 440-441. 



in Eastern .area, 424-425, 441. 

 Faulting along dikea, 347. 

 Federal mine. 273. 



Feleh mounlain dislrict, 2()0, 172, 473. 



FoMspar, alteration of, 107, 1U,S, Uo, 118. 122, 125,148,150,151, 

 155, 179, 180, 305, 306, 333, 334, 335, 336, 337, 338, 339, 340, 

 342, 343, 353. 356. 415. 418. 444. 



analysis of. 352. 



enlargement, 180. 395. 409. 



growth of 110. 



included in liornblende. 119, 412. 



of augite jiorpliyrite, 415. 



.dbiotite-slate, 338, 339. 



of biotite-sehist, 339, 340, 341. 



of chert-conglomerate, 451. 



rd' day-slate, 305. 



of conglomerate, 305, 365, 448. 



Id' diabase, 350, 351, 353, 354. 350, 3,.7, 359. 



of gabbro, 115. 



ofgneiss, 108, 109-110, 111,116,119.120,121, 123,125. 



of granite, 106, 107. Ul. 112. 122, 123. 



of gray wacko. 306, 332, 333, 331, 336, 337. 



of groeuston^^-conglome^ate, 379. 



of miea-scbist, 307, 308, 345. 



of mica-slate, 307, 308, 342, 343. 



ol" microgranite, 112, 113. 



of novaculitc. 147. 



of ])or[diyrite, 417. 



ofoTiarlzite. 153,305.369,391. 



of QuartJl-sl.ate, 134, 143, 117. 14K. 149, 1.50, 151, 152, 413. 



of schist, 117, 118, 121, 122. 125. 



of slate, 380. 



id' syenite, 114, 115, r22. 125, 



of Upper slate, 303. 343^ 341. 345, 465. 

 Iiiiiphyritie, 418. 



(See I'laijioclat<e. Ofthoclasr. MicrvcUne, Labra<iiirite, 

 Aain'thite, Oligoclane, Andesuie, AtmrthoclaHf.) 

 Ferrite of biotite-slate, 338. 



of gray wacke, 335. 



(See Iron oxide.) 

 Ferro-doloraite, 200, 393. 



desia-ibod. 399, 400. 

 Ferrnginons chert. 190. 192. 198. 279,280.294,362,364. 



breeeiation of, 207, 209. 



concretions in. 205-209, 212. 



ciyslallizalion of. 267-268. 



described. 194, '202-209, '264-265, 4911. 492. 494.500,502.504, 

 518. 



grades into ferrnginons slate, 194, '205. 



grades into fragniental rock, 209. 



grades into iron carbonate, 199. 202. '246. 256. 25'4. 206. '291. 



relations to aotinolitie slate. 200, 202, 2 1 :, 2 12-213, 246, '257, 

 258. 25D, 266. 



relations to ir-on ore, 202, '203, 275, 276, 283, 287, 295, 



origin of, 249. 254-257. 

 Ferruginous schist, origin of, 85-86. 

 Ferruginous slate, 190. 19S, 203, '279. 



described. 192-194. 20'2-205, '264. 



grades into ferruginous chert, 194, 205. 



grades into iron carbonate, 193, 201-202, 205, 253, 294, 



origin of. 253. 

 First National mine, 164, 

 Flint. 256, 



