460 



INDEX. 



Soudan formation, granite dikes in _ 356 



iron ores of 183-185 



life content of 438 



microscopic characters of fragmental part of. 180-181 



origin of 188-191,438^39 



peti'ograpliic characters of.. 179-188 



relations of, to adjacent formations 191-200 



to Archean intrusives- 199 



to basic eruptives- -- 200 



to Ely greenstone-. 205-207 



to Giants Range granite 356,359 



to intrusive rocks.- - -- 2ot) 



to Lower Huronian, Vermilion Lake area- 281-283 



to Ogishke conglomerate 206-209 



stratigraphic position of 33, 195-196 



structure of 175-179 



thickness of- - 200 



topography of 175 



Soudan Hill, conglomerate at - 287 



graphitic slate at 179 



intrusive rocks in iron-bearing formation at 199 



iron-bearing formation and associated rocks 



at — - 201-202 



Knife Lake slates at 295-296 



jasper, banded, at 230 



jasper replaced by iron ore at 231 



Soudan formation at 173,175 



structure of 224-225 



topography and geology at, relation of 431 



Specular iron ore, occurrence of 67 



Spherulites, occurrence of 167-168 



Spherulitic structure in Ely greenstone. . . 141-144, 146-148 

 Spherulitic texture in greenstones, plate showing.- 142 



Spilosites, occurrence of 345 



Spurr, J. E., cited on Biwabik formation 378 



citation of, on iron-bearing rocks 115, 385 



on iron-bearing rocks, origin of 190 



Stratigraphy of the district, table showing 33 



Streams of the disti'ict .- 40-41 



Streng, A., and Kloos, J. H., cited on geology of the 



district 70 



Stuntz, G. B., exploratory work by --. 214 



Stuntz Bay, Vermilion Lake, conglomerates at 252, 



291-292 



naming of... 214 



Stuntz conglomerate, relations of, to Ogishke con- 



glomerate 88 



Stuntz Island, conglomerate at 287 



dikes on 257,373 



granite-porphyry at 257 



Sucker Lake, Agawa formation at 325 



Slicker Point, Indian reservation at 20,54 



Knife Lake slates at 295 



Swede Bay, Knife Lake slates at 295 



T. 



Taconio system, components of 76,120 



That Mans Lake, Agawa formation at 325,326,329,330 



The Other Mans Lake, Agawa formation at 325, 



326,329,330 



This Mans Lake, Agawa formation at 325, 



326,329,330,331,332 

 Thompson, David, cited on travels in the North- 

 west 63 



Thunder Bay, Animikie series at 74 



Titanif erous magnetite, occurrence of 26 



Page. 

 Todd, J. E., cited on glacial deposits in Minne- 

 sota 425,426 



Topography of the district, features of 34-46 



relations of, to geologic structure 431-436 



Tower, conglomerate at 387,292 



greenstones and jasper folded near 311 



graphitic slates at 179 



greenstones near 211 



iron-bearing formation and associated rocks 



at. , 200-201 



iron-ore deposits at 23 



location of 52 



Lower Huronian rocks at 277 



metamorphosed slates near 349 



ore deposits at ' 243,244 



population of 20,52 



railroad built to 22,29 



slates at 292 



Soudan formationat 173,200-201 



Tower group, stratigraphic place of 88 



Tower Hill, jasper near 182 



greenstones and jaspers at, relations of 302-203 



iron-bearing formation and associated rocks at. 201 



Soudan formation at 173,175 



topography and geology at, relation of. 431 



Townline Lake, jasper reported to occur at 310 



Towns in the district, location and population of . 20, 53-54 



Township 55 North, Range 11 West 123 



T.58N.,R.10W 123 



T.60N.,R.6W 123 



T.60N.,R.7W 123 



T.60N.,R.14 W. 429 



T.60N.,R.15W 429 



T.60N.,B.16W 423 



T.61N.,R.13W.,seotion6 427 



T.61N.,R.14W... 428,429 



sectionsl,2 ' 427 



section 4 175 



section 10 156,427 



sections 11, 12, 14, 15, 16, 18, 19, 21, 22, 29, 



30 



427 



T.61 N.,R.15 W 131,428,429 



section 1 197,203 



section 2 197 



sections 174,197,203 



'section 4 174 



sectionO 287,293 



sections21-28 427 



T.61N.,R.16W 277,429 



T.62N.,R.2W-... 123 



T.62N.,R.4W ■ .- 123 



T.62N.,R.10W., sections 398 



section 30 119 



T.62N.,R.ll W 354 



T.63N.,R.12W.... 35,354 



section 1 360,436 



section2 37,360 



sections 166,199,200,359,360,436 



section 4 199,200,359 



section?.. 359,360 



stction8 360 



section 9 436 



section 11 354,436 



section 17 360,436 



section 18 199,360 



section 19 167,359,360 



section 30 3" 



