INDEX. 



531 



Peninsular ilininj; Cmnpnny. 1G9. 

 Pi-iinsylvauia Iron Carlmuato. 247. 

 PiMinkcM' crtiptives, relations to ICeweenawan eruptives. 'i49. 



Pt-liokee Gap, XIII. 22-27, 39, 40, 77, 104-105, 127, 130, 132, 133, 

 13S-139. 144, 157-15!), 171. 176,183, 184,185.197,200.213, 

 21S-22.I, 298, 300. 303. 344, 439, 446, 452, 454, 465. 

 Peiiokee (togehif, iiainf; con.siilertMl, 3, 

 Penoki-e rangn, 11-12, 22-27, 30, 42, 43, 52, 188, 220, 301. 

 Penokee series, iiui-onforinably above clierty linte.st<mi'. 454- 

 455. 

 relations to Aniniikie serie.s. 66, 261. 262, 468-470. 

 relations to Eastern san<lstone. 12. 361. 461-463, 466. 

 relations to Keweenawau. SO. 187, 188, 2il8, 299, 300, 301. 347. 



318. 3,58, 362. 443. 456-401, 469. 470. 

 relations to Martiuette series. 56,470-472. 

 relations to Sontln-rn Complex, 105, 109. 343. 444-454. 457 

 Peuokie, tjrst used by Whittlesey, 22, 

 Permian, 140, 252. 



Pewabi<-. proposal of, by Whittlesey, 22. 

 Pliyllite. 302, 304, 305-306, 



(8ee Vlay-slate.) 

 Pigeon point. 261, 

 Piseon river, 2ol. 

 I'iteli of ilikes. 273.276. 

 Plagioclase. alteration of, 115. 353.413.417. 

 of augiteporpbyrite. 415. 

 of biolite-sehist, 340. 

 of (liaba.se. 350, 351, 353, 354. 410. 413. 

 of gabbro, 115, 

 of gneiss. 109. 121,123. 

 of granite, 106,123. 

 of gray wacke. 333, 336. 

 of greeustone-couglomerate, 375, 376, 377, 

 of .jasper-con glomerate. 370. 

 of niierograuite, 112. 

 of porphyrite. 416-417. 418. 

 of Quartz-slate, 150, 

 of scliist. 118. 

 of syeiiite-sebist, 114, 

 relations to biotite, 354, 

 (.See Feldspar.) 

 Porphyrite, 109, 122. 349. 381, 388, 429, 432, 435. 

 described. 417-418. 



relations to gi'eenstone-cbnglonierate, 378, 416. 

 relations to jasper-conglomerate, 414. 

 Porphyritic structure of uiicrogranite. 112. 

 Porphyry, granitic, 36. 37. 

 I'ortage lake area. 14. 15. 

 Port Arthur, 202. 469.498. 

 Prjtato river, 109-111 121, 129, 159-160, 173, 178. 198, 199,223, 303, 



307, 308, 309, 324-325. 309, 440, 446, 448. 454, 471, 

 Potato river area, 10. 43-44, 104, 108-10!), 144. 146, 147. 304. 

 Potsdam sandstone, 19. 

 Presque Isle river, 179. 191. 279. 308. 369. 

 Presque Isle river area. 71. 

 Prospecting, rales for. 276-279. 

 Pseud<niiorpUs after iron carbonate, 201. 

 ofaitinolite, 2.58, 

 of hematite, 265, 

 of nulgnetite. 258. 265. 266. 

 Puniiielly, referred to. 7, 8, 15, 30-31, 32, 33, 50, 66, 78, 463. 

 Puritan mine. 231. 

 Pyrite of biotite-schist, 34U. 341. 

 of gneiss, 119. 

 of graj-wacke. 333, 335, 337. 

 of iron carbonate. 190. 



Pyrite of mica-schist, 308, 



ofslate,30.8. 342. 343,370. 

 Pyrolusite iu iron ore, 281. 

 Pyroxene, alteration of. 353. 354. 



of diabase. 350, 353. 350. 413. 



of gabbro. 115.410. 



of greenstone-conglomerate. 377. 



of syenite, 114. 115. 



(See DiitUa'je. Autjitf. MalacoUte.) 



(Jnarlz IVnni feldspar, 118, 180, 305, 333-340. 342. 343, 413, 414. 

 included in horn blende, 118. 

 of actiuolitic slate. 195, 210. 211.213, 215.258,259.266.302, 



364, 

 of biotite scUis't, 339, 340, 341. 

 of biotiteslate. 338.339. 

 of chert. 123. 



of chert -cimglomerate. 451. 

 of chert.v limestone, 127, 

 of chlorite rock. 111. 

 of day -slate. 305. 

 of concretions. 207. 

 of conglomerate. 174, 305. 395, 448. 

 of diabase. 350. 



of ferruginous chert, 205, 254, 235, 257. 362. 

 of ferruginous slate, 193. 204. 

 of gneiss. 1.18, 109, 110. 110, 119, 120, 121. 123. 125. 

 of granite. 106. Iu7, HI, 112, 113, 122, 123. 344. 

 of gray wacke 306, 307, 332, 333, 334, 335, 336, 337. 

 of greenstone-conglomerate. 375. 376. 377. 379. 

 of iron-bearing member. 267, 268, 

 of ircm carbonate, 190.200. 

 of limestone. 132. 

 of mica schist. 345. 

 of mica-slate. 342. 

 of niiciogTanite, 112, 113, 

 of porphyrite, 417, 418. 

 of quartziti-. 153. 154. 369, 391. 

 of quarlzrock, 133. 

 of Quartz-slate. 134, 143. 147. 148. 149.150.151.152.179-180. 



443. 408. 

 ofschist. 117.118. 121. 123. 

 of slate, 370, 376, 380. 

 of .syenite. 113, 114, 122, 

 of Upper slate, 303, 343, 344, 345, 465, 

 replaces plagiodase, 115, 

 solubility of. 256. 

 (See Clierl. SUica.) 

 Quartz amycdules. 377, 418. 

 Quartz enlargements. 112. 132, 150, 152, 153, 180, 185, 209, 267. 



288, 305, 334, 335, 339, 343, 345, 377, 395, 396, 444, 462, 468. 

 Quartz veins. 418. 



QUiirtzitc. 34, 36. 147, 148, 149, 176, 177, 178. 179. ISO. 201. 301. 303. 

 304-305, 347, 363, 308, 369, 391, 3'.i:!. 39 i. 395-i<l6. 43S. .140. 

 441.444, 449-431, 455.457.460.404.468.471.472.473,474. 

 de.wribed. 153-154. 1.55-150, 157, 1,58. 159-160, 161, 162, 16:1, 

 164,105,166, 107, 109.170.171, 326, 371, 372, 373,396, 4»0, 

 404-405, 40.8-409, 498, 518. 

 dip of 27u. 



Iragments of in iron-bearing member. 84. 175. 

 origin of. 77-78. 

 relatiims to dikes. 272. 274. 

 relations to Iron-bearing member. 181, 185, 

 relations to Iron ore, 94. 185. 199. 274. 276, 285, 286, 287, 291, 



292. 294. 305. 

 relations to quartz rock. 245. 



