INDKX. 



i:.;, 



— , Characteristics of, 125. 



Granite, Constituents of, nugite, 125. 



.feldspar, 125. 



.hornblende, 125. 



, quartz, 125. 



— of Duluth, 270-272, 485. 



— , Eruptive and nou eruptive, 305. 

 — , Huronian, 389, 390. 

 — , Inclusions in, 125. 



— of Kakabika Falls, 375. 



— at Lake Shebandowan, 396. 

 — , Localities for, 125. 



— in Menominee Region, 394. 

 Mesabi Range, 383, 899. 



— north of Thunder Bay, 396. 



— , Relation of Animiklo beds to, 399. 

 — , Relations, 125. 



Granitell. See Augito-syenite and Porphyry, Granitic. 

 Granitic porphyry. See Augite-syenite and Forphyry, Gra- 

 nitic. 

 Gratiot Lake, 164, 186. 

 Gratiot River, 165, 187. 



Great Conglomerate. See Conglomerate, Great. 

 Great Conglomerate Ridge, 164. 

 Great Palisades, 146-148, 314-318. 



, Diabases of, 315, 316, 317. 



. Fluidal structure of felsites of, 98. 



, Diabase-porphyrite of, 84, 316, 440, 442. 



, Glass inclusions in rocks of, 102. 



, Quartz-porphyry of, 103, 109, 146, 147, 317, 318, 440. 



, Relation of acid and basic rocks of, 435. 



Great Palisades (near), Gabbro of, 318. 



, Diabase-porphyrite of, 36, 80, 84, 318. 



Greenstones, Huronian, 389, 390. 



Greenstone Range, 164, 165. 



Greenstone, The, 61, 71, 73, 87, 154, 164, 187. 



, Alteration of, 70. 



at Eagle River section, 174, 175. 



, Extent of, 140. 



, Pumpelly on, 69, 70, 174. 



, Thickness of, 178, 187. 



.Thinning of, 187. 



, Veins in, 424. 



Gros Cap, Amygdaloid of, 349. 



, Felsite of, 349. 



, Huronian rocks of, 401. 



, Lake Superior synclinal at, 415. 



Cull Island, 330. 



Gunflint Lake, Schists of, 399. 



Hall, C. ~W., Publications of, 18, 23. 



Hancock, Sandstones and shales near, 193. 



Harbor Island, Trap of, 401. 



Hat Point, Animikie Group at, 368. 



Hill, E. P., 163. 



Hinkley, Potsdam sandstone near, 244. 



Hodge, J. T., Publication by, 16. 



Hornblende of hornblendc-gabbro, 56, 57. 



augite-syenite, 114. 



granite, 125. 



— , TJralitic nature of, 114, 396. 

 Hornblende-gabbro. See Gabbro, Hornblende. 

 Honghton, D., 5. 



— on conglomerates, 9. 



, Eastern Sandstone, ago of, 352. 



, Keweenaw Series, age of, 12. 



— , Publications of, 14, 15. 



— on traps, origin of, 10. 



Hubbard I: 



Hungarian River, Eastern Sandstone on, :: . 



, Faulting on, 355. 



, WaiUworth on rocks of, 363. 



H.mt, I - 



—on \iiimii-.i. Group, 157,384. 







.Bohemian Ban 



Diaki-' 



, Huroi 77,405. 



Kewceuawan of Thunder Bay, 332. 



Xipigon Group, 157. 



— , Publications of, 19,20, 21 



-on i purtfr porphyry of Niplgon Straits, 31. 



Volcanic ash, 437. 



Huron I!.i 



Huronian, Marquette and Menomlnei 802-398, 



, Diorites of, 393. 



, Gneiss of, 393. 



.Granite of, 394. 



.Greenstone- 



. kinds of rock of, 393, 394. 



.Relations of, to PenokM Huronian, and Animikie 



Group, 394,395. 



, Schists of, 393. 



Huronian, Original, 386-391. 



.Characteristics of, :i86-389. 



, Dikes of, 389. 



, Eruptives of, 390, 434, 145. 



, Relation of, to Animikie Group, 880,886, 890, 891 



.Keweenaw Series, 890, 891, 404,405,406, 407,443- 



445 



, Lake Superior synclinal, 416-418. 



Huronian, Penokee, 391, 392. 



, Relation of, to Animikie Group, 392. 



Hyperite of Uaefai 



Iron River, Noneanch shah- bell on - 



, Outer sandstone and conglomerate of Porcupine 



Mountains on, 220. 



, Sandstones, &c, of, 222. 



Ironton Trail, Diabase porphyzite of, 83. 



, Granitic poqdiyry of, 231. 



, Orthoclase-gabbro of, 53. 



Isle Royale, 65, 104, 329-331, 411. 



, Area of, 27. 



. Copper of, 430. 



, Height of, 331. 



, Sandstone of, 831. 



, Thickness of Lower Division on, 159. 



, Topography of, 330. 



, Upper Division on. 154. 



vein, 189. 



Isle St. Ignacc, 27, 334, 335, 413, 414. 

 Jackson, C. T., 5. 



— on Bohemian Rai _ 

 diabases, origin of, 10. 



.Keweenaw Series, age of, 12. 



— . Publications of, 15, 10, 17, IS, 19, 20. 

 Jnlien, A. A., 23, 33, 45. 



— on alteration-products of olii ine,39. 

 orthoclaso in gabbros, 11. 



— , Publication of, 23. 

 Kakabika Falls, 874, 375, 



, Animikie elates at, 3S0. 



Kaniinistiquia River, Animikie Group at, 371. 

 , Dikes on, 374. 



