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, Duluth 
Group, Lester River Group, Saint Louis River Gab 
bros, Temperance River Group. 
— —-—, Rocks of, 266. 
—, Geological Survey of, 7th Annual Report, 138, 142. 
———-—, 5th 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. 
——, Anugite-syenite of, 115, 116, 185, 435. 
——, Olivine-diabase of, 184. 
——, Foster and Whitney on, 184, 
--—, Orthoclase-gabbro of, 52, 53, 184. 
Mount Houghton, 181, 184. “ 
——, Felsite of, 102, 104, 182, 183, 343, 433. 
——, Foster and Whitney on, 31, 149, 183. 
——, Quartz-porphyry of, 149. 
Miiller, 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. 
——, Sandstone, 24, 339. 
Nipigon Straits and Islands in, 334, 338, 
Nouesuch mine, 221. 
——, Copper of, 420. 
——, Sandstones of, 131, 132, 221. 
———, Basic detritus in, 128. 
— Shale Belt, 221-224. 
— —— on Iron River, 222. 
— — — — Little 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., 
224, 225. 
——-—possibly like ‘‘breccias” of Michipicoten Island, 
436. 
North Brother, 103. 
North Shore of Lake Superior, Agate Bay Gronp, 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 anorthite 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. 
ee , Eastern Sandstone of the, 208. 
—-—--—--—— , Stratigraphy in, 207, 208. 
-----—— , Union of South and Main ranges in. 208, 
—-—-—--—. See Porcupine Mountains. 
“Ordinary type” diabase of Pumpelly. See Diabase, olivine- 
free. 
Orthoclase of augite-syenite, 113. 
——diabase-porphyrite, 78, 79. 
——felsites, 99. 
——hornblende-gabbro, 57. 
——olivine-diabase, 69. 
——orthoclase-gabbro, 51. 
——quartzless porphyry, 92. 
—(porphyritic) of quartzless porphyry, 93. 
——quartz-porphyry, 99. 
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