464 
Tylor’s Fork. See Bad River. 
——, Quartz-porphyry of, 103, 106. 
Union Mine, Olivine-free diabase of, 67, 219. 
— —, Outer trap belt exposed at, 219. 
——, Sandstone of, 132, 220. 
Union River, Outer sandstone exposed at, 220. 
——, Trends of strata on, 200. 
United States Lake Survey, 330. 
Upper Division, Characteristics of, 152-154. 
—— Eruptives of, 152, 440. 
——on Isle Royale, 154. 
——— Keweenaw Point, 153. 
— —— Montreal River, 153. 
——— North Shore, 154. 
——— Ontonagon River, 199. 
——— Porcupine Mountains, 153, 208. 
——-— Portage Lake, 153, 193. 
—— in Wisconsin. 
—— without copper, 426. 
Vanhise, C. R., on uralitic hornblende, 396. 
—, Determination of feldspars by, 437-440. 
Veins, Calcitic, in Greenstone, 424. 
—, Nature of, 424, 425. 
—, Transverse, 423-425. 
Vermillion Lake, Prof. A. H., Chester on rocks of, 398. 
——, Schists of, 397-399. 
———L—, Relation of, to Huronian Animikie Group, 397. 
Victoria Island, Dike rock of, 372. 
Viridite an alteration product of olivine, 39. 
— of orthoclase-free gabbro, 43. 
Von Buch on origin of conglomerates, 8. 
Wadsworth, M. E., 5. 
— on ashbed-diabase, 138, 422. 
—— bibliography of Lake Superior Rocks, 14, 431. 
—— diabase origin of, 11. 
—— Douglas Houghton River, sandstone of, 356. 
— — Hungarian River, sandstone of, 355. 
—— Keweenaw Series, age of, 12, 13. 
—, Publication of, 23. : 
—on relation of diabases of Saint Croix Valley and Kewee- 
naw Point, 239. 
——relation of Eastern Sandstone and Keweenaw Series, 
363-369. 
—— Torch Lake, sandstone of, 357. 
Wausan, Huronian rocks of, 400. 
Wauswaugoning Bay, Animikie Group on, 368, 369. 
Western Sandstone, 153, 154, 365, 366. 
—— Characteristics of, 365, 366. 
—— Extent of, 365. 
——, Relation of, to Eastern sandstone, 366. 
—----— Mississippi Valley sandstone, 366. 
See Douglas County Copper Range. 
White, B. N., 3.4. 
White on Porcupine Mountains, 207, 224. 
INDEX. 
White on South Range, 202. 
White River, Sandstone of, 233. 
White Fish River, Sandstone of, 351. 
Whitney, J W., Publications of, 16-18. 
—. See Foster and Whitney. 
Whittlesey, C., 5, 17, 19, 22, 44. 
—on Bad River Country, 207. 
—— Bohemian Range, 180. 
—— Douglas County Copper Range, 258. 
—— Montreal River, 207. 
——Poreupine Mountains, 207. 
—, Publications of, 17, 19, 22. 
Wichmann, C., Diorites of, 393. 
—on Huronian greenstones, 394. 
———, Marquette and Menominee, 394. 
Williams, C. P., 163. 
Willis, on quartzites of Pokegoma Falls, 384. 
Winchell, N. H., 4, 5, 7, 101. 
— on acid eruptives, 12. 
—— Animikie Group, 382, 397, 399, 443. 
——diabases, origin of, 10. 
—— Duluth granite, 145. 
——— Group, 277. 
—— Eastern Sandstone, 431. 
—— faults of North Shore, 142. 
—— Great Palisades, 316. 
—— Gunflint Lake, 382, 399. 
—— Keweenaw Series, age of, 12. 
———— Relation of to other formations, 443-445. 
—, ‘‘Metamorphic shales” of, 138, 287. 
—on Pigeon River dikes, 370, 371. 
———— hills, 382. 
——Poplar River granite, 145. 
—, Publications of, 20, 23, 431. 
—on Saganaga Lake, 399. 
—— Saint Louis River gabbro, 269, 272. 
— —Thunder Bay schists, extension of, 397. 
—— traps, ll. 
—— Vermillion Lake schists, 397. 
Wisconsin, Area of Keweenaw Series in, 27. 
—, Possible copper of, 427. 
—, Potato and Bad River districts, 230-234. 
—, Northwestern, Diabase-porphyrite of, 235, 236. 
——~, Sources of information on, 234. 
——, Stratigraphy of, 234. 
——, Southern belt of, 234-241. 
——. See Douglas County Copper Range. 
See Taylor's Falls. 
—, Geological Survey of, 2, 7, 35, 39, 41, 44, 45, 46, 52, 54, 56, 63, 
69, 74, 77, 89, 105, 125, 156, 207, 227, 235, 251-258, 365, 383, 391, 
392, 393, 394, 398, 404, 410, 411, 412. 
Zirkel, F., on rhyolites, 98, 109. 
——trichites, 312. 
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