462 ? INDEX. 
South Range, 201, 208. 
——, Dips of rocks of, 202, 204, 205. 
—-—, Eastern sandstone on, 360. 
——, Foster and Whitney on, 204. 
——, Limits of, 201. 
——on Montreal River, 229. 
——— Ontonagon River, 203. 
——, relation of, to Keweenaw Fault, 205. 
—— —— Main Range, 204, 205, 208. 
—— at Silver Mountain, 202, 203. 
South Shore Rocks, Eastern sandstone, 351-365. 
———, Haronian, Marquette, 392-395. 
———~—, Penokee, 391, 392. 
——~—, Michigan, 161-229. 
——-—, Minnesota, 234-259. 
———, Wisconsin, 224-259. 
South Side Mine, 189. 
Spar Island, Dike of, 273. 
Special Report on Trap Dikes, &c. See Hunt, T.S. 
Spencer, J. W., Publication of, 23. 
Split Rock River and vicinity, 301-303. 
——-—, Anorthite-rock of, 59, 60. 
———, Augite-syenite of, 116, 121. 
— —-—, Beaver Bay Group on, 298. 
--—-—, Diabase-porphyrite on, 84, 
———, Felsites of, 107, 291, 301. 
———, Granites of, 304. 
———, Olivine-diabase of, 76, 291. 
—— —, Orthoclase-free gabbro of, 48, 302. 
Stannard’s Rock, 197, 198. 
——, Felsite of, 93, 94, 197, 198. 
——, Foster and Whitney on, 197. 
— —, Mather on, 197. 
Stevens, W. H., 163. 
Streng, A., and Kloos, J. H., on diabase-porphyrite, 235. 
———on Duluth Group, 277. 
——-—, Saint Louis gabbro, 269. 
——-—, Publication of, 22. 
Strong, M., 5, 7, 11, 35, 44, 410. 
—on Saint Croix Valley, 238, 411. 
—— Wisconsin, Northwestern, 234. 
Stuntz, G. W., on Mesabi Range, 399. 
Sucker Bay, Orthoclase-free gabbro of, 43, 47, 286. 
Sucker Brook, Orthoclase-gabbro of, 373. 
Sucker River, Olivine-diabase near, 72, 76. 
——, Orthoclase-free gabbro of, 47. 
Suffolk Mine, 81, 176, 177. 
Sweet, E. T., 5,7, 10, 11, 35, 44, 410. 
—on Black River Rocks, 251-258, 441. 
—on Douglas County Copper Range, 250-258. 
—, Publications of, 22, 23. 
— on Saint Croix River, 238, 249, 411. 
—— Saint Louis Slates, 412. 
—— Wisconsin, Northwestern, 234. 
Synclinal, Lake Superior. See Lake Superior. 
Taconic Group, Winchell on Western Equivalents of, 443. 
Tale, alteration product of olivine, 39. 
Taylor's Falls, Contact of Potsdam Sandstone and Keweenaw 
Series at, 236-238. 
Temperance River and vicinity, Anorthite-rock of, 59. 
——-—, Beaver Bay Group on, 298. 
———, Geological descent of strata at, 264, 265. 
———, Temperance River Group, 323, 325, 326. 
Temperance River Group, 323-329. 
— — —at Baptism River, 326. 
Temperance River Group, Beaver Bay Beds of, 318, 319 
— ——, Caribou Point, 328. 
---- , Copper possibly in, 424. 
——-—, Characteristics of, 265, 324. 
-— — _—, Detrital rocks of, 327-329. 
—— —, Dikes of, 329. 
——-—, Dip of beds of, 324. 
———, Faults of, 329. 
——-—at Good Harbor Bay, 329. 
———— Grand Marais, 327. 
——— — Manitou River, 328. 
——.- -— Poplar River, 328.: 
———— Temperance River, 325, 326. 
——-—, Thickness of, 323. 
Thompson, Saint Louis slates at, 262. 
Thompson Island, Dike of, 373. 
Thoulet, J., method of determining feldspars, 437-440. 
Thunder Bay and vicinity, Animikie Group on, 375, 380. 
———, Chert of, 375. 
———, Dip on, 333. 
———, Dolomitic sandstone of, 376. 
———, Erosion on, 377, 405. 
——  —, Interbedded diabases of, 375. 
———, Keweenaw Series, 331-333, 403. 
——-—, Parallelism of Huronian and Keweenaw Series on, 
405. 
———, Sandstones of, 156, 157, 332, 383, 
——-—, Schists of, 331, 376, 396. 
---- , Age of, 397. 
———. See Thunder Cape. 
Thunder Cape, Dike of, 376. 
——, Olivine-gabbro, 377. 
—-—, Slates of, 331, 376, 378. 
Tischer's Creek, Augite-syenite of, 120. 
——, Lester River Group near, 279. 
Titanic acid in orthoclase-gabbro, 52. 
Titaniferous magnetite. See Magnetite. 
Tobacco River, Eastern Sandstone on, 354. 
Topography affected by basic rocks, 141-143. 
Torch Lake, Eastern Sandstone near, 185, 359. 
Torch Lake Railroad, Eastern Sandstone on, 356. 
——-—, Quartz-porphyry of, 103, 104, 186, 196. 
———. See Conglomerate, Calumet. 
Totogatig District (T. 44, R. 9W.), Olivine-diabase of, 75. 
——(T. 42, R. 11 W.), Diabase-porphyrite of, 83. 
Township, Michigan, 46, R. 39 W., 203. 
———,R. 41 W.., 202, 203, 204, 360. 
——, 48, R. 36 W., 202. 
———, R. 43 W., 105. 
——-—, R. 44 W., 201, 202. 
——, 49, R.36 W., 202. 
——-—, R. 42 W., 103, 214. 
———, R43 W., 214. 
———, R. 44 W.., 212, 213. 
———, R. 45 W.., 218, 219, 220, 223, 224. 
——-—, R. 46 W.., 225. 
———, R.47 W,, 226. 
———. R. 48 W., 226. 
——, 50, R. 39 W., 94, 103, 199, 200, 214, 225, 359, 360. 
———, R. 40 W., 199, 214, 225. 
——-—, R. 41 W., 214, 222, 224. 
———, R. 42 W., 217, 222, 224. 
———, R. 43 W.., 105, 131, 209, 210, 213, 224. 
———, R. 44 W., 82, 103, 106, 209, 211, 213, 215, 217, 218, 219, 
220. 
— Neel 
