INDEX. 
Logan on ‘crowning overflow,” 381, 382, 
—— East Coast Keweonawan, 347, 348. 
———— Huronian, 401. 
—-— greenstones, Huronian, 389. 
—— Kaministiquia River slates, 374. 
—— Keweenaw Series, age of, 13, 341, 344. 
—— Michipicoten Island, 24, 343. 
——Nipigon Group, 157. 
—— Original Huronian, 386-388. 
—— Pic River Huronian, 401. 
—, Publications of, 15, 16, 17, 20. 
—,on Thunder Bay, 330, 332. 
———-—,, sandstone, 332. 
—— ——, schists, 396, 397. 
———-—, schists west of, 374. 
Lone Rock, Nonesuch shale belt near, 223. 
Lower Division, Keweenaw Series, 152, 154-160. 
———-—, on Bad River, 158. 
——-—-——— , Gabbros of, 155. 
----— Black and Nipigon Bays, 160. 
— Douglas County Copper Range, 159. 
———— Isle Royale, 159. 
———-—,Nipigon sandstone of, 157. 
———-—, on Ontonagon River, 158. 
———-—, in Saint Croix Valley, 159. 
———~—, Thickness of, 157-160. 
Lucille Islands, 330. 
——, Animikie Group at, 369. 
——, Keweenawan diabase on, 369. 
Macfarlane, T., 6. 
—, on Animikie Group, 385, 
—— ‘Crowning Overflow,” 382. 
—— East Coast Keweenawan, 347, 348. 
—— Mamainse, 160, 348. 
—— Michipicoten Island and its rocks, 85, 86, 87, 93, 112, 160, 
341-346, 436, 437. 
—— Origin of traps, 10. 
———— felsites, 12. 
—, Publications of, 20, 23. 
—on Silver Islet, 378. 
— — Thunder Bay rocks, 332, 377-379, 405. 
Magnetite of augite-syenite, 134. 
— —diabase-porphyrite, 78, 79. 
— — olivine-diabase, 70. 
—— olivine-free diabase, 62. 
—— orthoclase-gabbro, 51. 
——orthoclase-free gabbro, 41. 
Main Trap Range, 165, 187, 188, 198, 201, 208, 229, 414, 
Mamainse, 160, 348, 415. 
—, Dikes of, 143. 
Manitou Island, Outer Conglomerate on, 179. 
——, Kind of strata on, 414. 
Maniton River, Temperance River Beds on, 324, 328, 
Marcon, J., 5,11. 
—, Publications of, 16, 17. 
Marquette, 414, 415. 
Marvine, A. R., 5, 7, 10, 21, 52, 163, 416. 
— on amygdaloids, origin of, 11. 
—— Calumet Conglomerate, 195. 
—— Eagle River Section, 167-178. 
——rocks of Houghton and Keweenaw Cos., 188. 
457 
Mather, W. W. on Stannard’s Rock, 197. 
Maw-ske-quaw-caw-maw River, Augite-syenite of, 124, 321, 
822. 
——, Orthoclase-gabbro of, 49, 322. 
McIntyre, 380, 381, 
McKay's Mountain, 374. 
McKinlay, R., 3, 262. 
—on Beaver Bay Group, 278. 
—— Duluth Group, 278. 
—— Snake and Kettle River district, 234. 
—--South Range, 360-366. 
—. See Campbell, Chauvenet. 
Median Valley, Keweenaw Point, 179, 187, 188. 
Mendota Mine, Diabase of, 184. 
Melaphyr of Pumpelly. See Diabase, Olivine — 
grained). 
—— Macfarlane, 85, 87, 93. 
Menominee Region. See Huronian, Marquette, and Menomi- 
nee. 
Mesabi Range, Animikie group at, 382-384. 
——, A. H. Chester on, 383. 
——, Granite of, 383. 
——, Schists of, 398, 399. 
Metasomatic Development of Rocks of Lake Superior. See 
Pumpelly. 
Michigan, Keweenaw Series in, Chap. VI. 
———on Keweenaw Point, 163-198. 
——-— from Portage Lake to Ontonagon River, 198-201. 
———on the South Range, 201-205. 
———. See Bohemian Range, Eagle River Section Eastern 
Sandstone, Keweenaw Point, Portage Lake Sec- 
tion, Sowth Range. 
Michigan, Geological Survey of, 31, 44, 52, 65, 73, 80, 91, 188, 189, 
190, 191, 195, 197, 247, 351, 352, 359, 360, 406. 
Michipicoten Bight, 347, 413. 
Michipicoten Island and vicinity, 341-346, 415. 
——, Amygdaloids of, 345. 
——, Area of Keweenaw Series on, 27. 
——, Diabases of, 343. 
——, Diabase-porphyrite of, 78, 80, 85, 87, 433. 
—-—, Dip of rocks on, 343. 
——, Felsite of, 103, 112, 343, 346. 
——, Lower Division on, 160. 
——, Macfarlane’s specimens from, described, 85, 86, 87, 93, 
112, 342-346. 
——, Peculiar “breccias” of, 436, 437. 
——, Quartz-porphyry of, 93, 112, 346. 
—-—, Relation of acid and basic rocks of, 433, 434. 
—-—, Stratification on, 341. 
——, Thickness of rocks of, 342. 
Michipicoten River, Huronian rocks of, 400. 
Microfelsite of Rosenbusch, 96. 
Middle River, Rocks of, 256. 
Mineral River, Nonesuch Shale Belt on, 224. 
Minnesota, Area of Keweenaw Series in, 27. 
—, Authorities on, 262. 
—, Course of rock-belts in, 265. 
—, Dikes of, 143, 264, 278, 283, 293, 294, 301, 306, 307, 320-323, 329, 
384. 
--, Duluth to French River, 264. 
—, French River to Split Rock River, 264. 
—, General structure of, 140, 265. 
—, Lakeward dip of rocks of, 141. 
—, Lake Superior coast of, 262-329. 
—, Mesabi Range, 382-384, 398, 399. 
—, Snake and Kettle River District, 241-246. 
—, Split Rock River to Grand Portage Bay, 264, 265. 
, (fine- 
