458 



INDEX. 



Minnesota, Subordinate groups of, 266. 



— , Temperance River to Grand Portage, 265. 



— , Thickness of Lower Division on, 159. 



— . See also Agate Bay Group, Beaver Bay Group, Dulutk 



Group, Lester River Group, Saint Louis River Gab 



bros, Temperance River Group. 



, Rocks of, 266. 



— , Geological Survey of, 7th Annual Report, 138, 142. 



— , eth Annual Report, 138, 145. 



, 9th Annual Report, 101 ,382, 398. 



, 10th Annual Report, 399, 442, 443. 



— mine, Copper vein of, 422, 423. 

 Mission Creek, Animikie slates of, 262. 

 Montreal River, Diabase, &c, of, 229. 

 , Amygdaloids of, 136. 



__. — ( Lower Division on, 158. 



, Olivine-free diabase of, 16, 67, 68, 229. 



, Sandstones of, 133, 225, 404. 



, Sources of information on, 207. 



, Upper Division on, 153. 



Montreal River Section, 226-230. 

 Moose Creek, 247, 249. 



, Olivine-diabase of, 75. 



free diabase of, 68. 



Mosler, C, Publication by, 23. 

 Mosquito Lake, 163. 

 Mount Bohemia, 184, 185. 



, Angite-syenite of, 115, 116, 185,435. 



, Olivine-diabase of, 184. 



, Poster and Whitney on, 184. 



, Orthoclase-gabbro of, 52, 53, 184. 



Mount Houghton, 181, 184. 



, Felsitc of, 102, 104, 182, 183, 343,433. 



, Foster and Whitney on, 31, 149, 183. 



, Quartz-porphyry of, 149. 



Muller, A., Publications of, 18. 

 Murray, A., 400. 



, Publication of, 15. 



, on Thunder Bay schists, 396, 397. 



National mine, Copper vein of, 423. 



, Quartzless porphyry of, 94. 



Neebing, Animikie Group at, 380. 



New Hampshire, Geology of, 40, 51. 



Nicholson, H. A., Publications of, 21. 



Nipigon Bay, Contact of sandstone and gabbro on, 333. 



, Gabbro of, 44, 50, 333, 334, 438. 



, Lower Division on, 160. 



, Sandstone of, 128, 333, 336. 



Nipigon Group, Hunt on, 157. 

 Nipigon Lake and Basin, 338-341. 



, Age of rocks of, 341. 



, Augite-syenite of, 339. 



, Limestone of, 24, 128, 340. 



, Relation of Keweenaw Series and Huronian on, 408. 



, Saudstone, 24, 339. 



Nipigon Straits and Islands in, 334, 338. 

 Nonesuch mine, 221. 



, Copper of, 420. 



, Sandstones of, 131, 132, 221. 



, Basic detritus in, 128. 



— shale Belt, 221-224. 



on Iron River, 222. 



Littlo Iron River, 222. 



Lone Rock at, 223. 



on Mineral River, 221. 



Presqu' Isle River, 223. 



Nonesuch Shale Belt in T. 50, R, 39 W. ; R. 40 W. ; R. 41 W. t 

 224, 225. 



possibly like "breccias" of Michipicoten Island, 



436. 

 North Brother, 103. 

 North Shore of Lake Superior, Agate Bay Group, 284-294. 



, Beaver Bay Group, 298-323. 



, Black and Nipigon bays, 331-338. 



, Characteristics of, 260, 261. 



, Conglomerates of, 30. 



, Distribution of Keweenaw Rocks on, 261-266. 



, Duluth Group, 275-279. 



, Isle Royale, 330, 331. 



— to Nipigon Bay, 329, 330 



, Lester River Group, 279-283. 



, Minnesota coast, 261-329. 



, east end, 294. 



, Nipigon Lake, 338-341. 



, St. Louis River Gabbros, 268-275. 



, Temperance River Group, 323-329. 



, Thunder Bay to Nipigon Bay, 331-338. 



Norwood, J., 5. 



— on diabases, origin of, 10. 

 dikes, 143, 264. 



Douglas County Copper Range, 258. 



Great Palisades, 316. 



Metamorphic sandstone or shale, 138, 287,288. 



, North Shore rocks, folding of, 140. 



Olivine, Alteration of, in basic rocks, 39. 



— of auorthite rock, 59. 



basic original rocks, 38. 



melaphyr, 69-71. 



orthoclase-free gabbro, 38. 



Olivine-diabase. See Diabase, Olivine-. 



Olivine-free diabase. See Diabase, Olivine-free. 



Olivine-gabbro. See Gabbro, Orthoclase-free. 



Ontonagon River, 155, 198-201. 



, Copper of, 422. 



, Eastern Sandstone on, 359, 360. 



, Falls of, Exposures at, 302. 



, Keweenawan rocks of, 199. 



, Lower Division on, 158. 



, Outer Conglomerate on, 149. 



, Quartz-porphyry on, 150, 199,433. 



, Sandstones of. 199, 200. 



, Stratigraphy on, 198, 199. 



, Thickness of Keweenaw Series on, 201. 



, Trend of strata east of, 208. 



, West Branch of, 203. 



Ontonagon, and Montreal Rivers, Country between, Dip of 

 strata of, 208. 



-, Eastern Sandstone of the, 208. 



, Stratigraphy in, 207, 208. 



„ — ._ Union of South and Main ranges in. 2C8. 



, See Porcupine Mountains. 



"Ordinary type " diabase of Pumpelly. See Diabase, olivine- 

 free. 



Orthoclase of augite-syenite, 113. 



diabase-porphyrite, 7S, 79. 



felsitea, 99. 



horublende-gabbro, 57. 



olivine -diabase, 69. 



orthoclase-gabbro, 51. 



quartzless porphyry, 92. 



— (porphyritic) of quartzless porphyry, 93. 

 quartz-porphyry, 99. 



