450 
—on Huronian greenstones, 394. 
—on relation of Keweenaw Series to Huronian, 407. 
—, Publications of, 20, 21, 22. 
Brulé Lake, Chauvenet’s and McKinlay’s visit to, 272. 
——, Diabase of, 275. 
——, Duluth gabbro at, 294. 
——, Gabbro of, 56, 272. 
——, Porphyry of, 124, 272. 
Brulé Range, Rocks of, 257. 
Brulé River and vicinity, Beaver Bay Group on, 321, 322. 
— ——, Orthoclase-free gabbro of, 38, 44, 49, 144, 321. 
Brunschweiler River, Flattening of dips at, 233. 
——, Orthoclase-gabbro of, 54. 
——, Quartzless porphyry of, 93, 95. 
——, Gabbros of, 232, 233. 
——, Upper Division on, 153. 
Burlington Bay, 264. 
Burt, W. A., and Hubbard, B., Paper by, 16. 
Cabmous Neiding Point (Island near), Diabase-porphyrite 
of, 338. 
Calciferous Sandrock, 351, 443, 444, 445. 
Calcite of diabase-porphyrite, 79. 
— of sandstones, 128. 
—veins, 423. 
Calumet and Hecla mine, 188. See Conglomerate, Calumet. 
Calumet Conglomerate. See Conglomerate, Calumet. 
Cambrian, extent of term, 443-445. : 
Cambrian Sandstone of Mississippi Valley, 234-250, 366. 
——, Extent of, 366. 
——, Relation to Keweenaw series, 366, 443. 
— —, See Eastern Sandstone, Potsdam, Wiscons.n, North 
western. 
Campbell, A. C., 3. 
— on Beaver Bay Group, 309. 
—— North Shore, 262. 
—— Mamainse, 348. 
—— Porcupine Mountains, 207. 
—and McKinlay on Baptism River Rocks, 272. 
Canadian Naturalist, 335, 378, 405, 432. 
Canada, Geology of, 3, 374, 377, 385, 386-390, 400, 401, 402. 
—, Geological Survey of, Report of 1848, 390. 
---—--— — , 1863-'66, 400, 436. 
----- , 1866-"69, 123, 157, 339, 340, 374, 380, 381, 385. 
a , 1870-"71, 402. 
—--—-—-- , 1872-"73, 382. 
Cape Choyye, Keweenawan rocks of, 347, 415. 
Cape Gargantua, Keweenawan rocks of, 347, 415. 
Caribou Island, Olivine-gabbro near, 375. 
——, Upper Division at, 154. 
Caribou Point, Olivine-diabase of, 72, 77, 328. 
——, Sandstone of Temperance River Group at, 328. 
Carlton's Peak, Anorthite rock of, 59, 329. 
——, Origin of, 329. 
Carp Lake, Felsite of, 210. 
——, Porphyry and diabase of, 213. 
——, Sandstone (inner) of Porcupine Mountains at, 213. 
Carp River, Conglomerates of (T. 51, R. 43 W.), 215-717, 220. 
—-—, Diabase-amygdaloids exposed on (T, 51; R?42 W.), 215. 
—-—, Diabases of (T. 51, R. 43 W.), 215-217. 
——, Felsites of (T. 43 R. 43 W.), 105. 
———— (T.51 R. 43 W.), 106, 210. 
——, Outer sandstone and conglomerate of Porcupine Mount- 
ains on (T. 50, R. 45 W.), 220. 
——, Sandstone of (T. 51, R. 42 W.), 132. 
——, Stratigraphy on (T. 51, R. 43 W.), 215-217. 
Carp River. See Porcupine Mountains. 
INDEX. 
Cascade River, Diabases of, 296. 
——, Diabase-porphyrite of, 85, 295. 
——, Duluth and Lester River Groups on, 296. 
——, Gabbro of, 56, 295. 
——, Quartz-porphyry of, 295. 
—— visited by Chauvenet and McKinlay, 273, 295. 
Castle Danger, Agate Bay Group at, 290. 
Cedar Island, Felsitic porphyry of, 108, 306, 
Chamberlin, Prof. T. C., 4, 5, 7, 10, 11, 410. 
—, on Keweenaw series of Northwestern Wisconsin, 234. 
—— St. Croix Valley, 236-238, 411, 412. 
— — Snake River diabases, 242, 243, 412. 
——, Publications of, 23, 432. 
Chase’s Brook, Melaphyr of, 247. 
Chassells, J., 4, 197. 
Chauvenet, W. M., 3, 262. 
—, on Brulé Lake rocks, 272. 
—— Eagle Mountain rocks, 145, 273. 
— — Eastern Sandstone, 359, 360, 
—— Hungarian River (sandstone of), 354. 
— — Porcupine Mountains, 207. 
—— Torch Lake railway (sandstone of), 358. . 
—and McKinlay at Cascade River, 295. 
———— Brulé Lake, 272-274. 
——— — Eagle Mountain, 273. 
Chegwatona Lake, Diabases of, 243. 
Chester, Prof. A. H., Assistance of, 4. 
— on the Mesabi Range, 383, 384, 398. 
— — Vermillion Lake schists, 397-399. ~ 
Chester Creek and vicinity, Diabases of, 276, 277. 
———~—, Dikes of, 278. 
———-—, Gabbro of, 277. 
—— —-—, Lester River Group at, 281. 
———~-, Rocks of, 275-278. 
See Duluth. 
Chlorite of amygdaloids, 90. 
—— olivine-free diabase, 64. 
—— orthoclase-free gabbro, 43. 
—— sandstones, 128. 
Chief’s Bay, Nipigon Lake, Limestones of, 340. 
Chippewa Harbor, Sandstone of, 331. 
Chynoweth, B. C., 4. 
Clam Falls District, Diabase-porphyrite of, 83 
—-—, Felsitic porphyry of, 103, 107. 
Cloquet River, Gabbros of, 44, 46, 268, 269, 272. 
———-—, Feldspar of, 438. 
Conglomerates, 127, 151. 
—, Copper in, 420. 
—, Extent of, 151. 
—, Huronian, 386-388. 
—, Origin of, 127. 
——-, Foster and Whitney on, 8 
——-—, Houghton on, 9. 
—, Pebbles of, 127, 167, 168, 195, 196. 
—, Porphyry, Distribution of, 155. 
—, Source of materials of, 31, 32, 186, 195, 196. 
—--—--—— , Foster and Whitney on, 31, 32. 
—, Variations in composition and structure of, 151. 
Conglomerate, Albany and Boston, 118, 119, 151, 190, 191. 
—, Calumet, Alterations in, 195. 
——, Copper of, 420, 421. 
——, Pebbles of, 105, 195-196. 
——, Sandstone of, 130. 
—, The Great, at Eagle River Section, 167-169. 
———~, Montreal River, 227-229. 
——-—, Ontonagon River, 199. 
