INDEX. 



557 



Page. 



Irhthyornis, Wingsot 75 



Iddiugs, Joseph P. , cited 242, 278, 285 



, Microscopic petrography of Eu- 

 reka District, by 242 



Illustrations, List of xi 



Interlobate moraines defined 301,313 



described. . .315, 323, 328, 330, 339, 341, 351, 373, 



380, 382, 384, 397 



Intermediate moraines. (See Interlobate 

 moraines. ) 



Investigations initiated xv 



Iphidea depressa 258 



Irving, R. D., cited in respect to terminal 



moraines 316 



on copper-bearing rocks of Lake 



Superior 89 



Isbister, A. K., cited 265 



Isle Royale, Mich 137,141,174,177,183 



.Copperon 188 



, Relation of rocks of, to rocks of 



Minnesota coast 141 



, Thickness of Keweenawan rocks 



of 137 



Juniperus occidentalis 246 



Kakabika Falls, Canada 159 



Kamosdifined 299 



Kaministiquia River, Canada 158, 159 



, Animikie group on 158 



Kanab Canon, Paleozoic section of 272 



Kettle moraine synonymous with term- 

 inal moraine of the second glacial 

 epoch. 291 



Range 321 



River.Minn 187 



Kettles 311 



KeweenawBay 140,147,148,177 



Fault 139,154,155 



- , Foster and "Whitney's view as to ... 154 



Point, Mich 114,115, 



117, 119, 121, 123, 130, 136, 139, 174 



, Ashbedof 109,119,127 



,BareHillsof ,. 139 



, Bohemian Range of 93, 126, 139, 153 



, Eastern sandstone on 148 



,Faulton 139,179 



, Great conglomerate of 121 



, Greenstone group of 133 



, Outer conglomerate of 131, 1 32 



, Southern range of 93 



1 The ashbed of 109 



, The greenstone of ... 107, 121, 131, 183, 186 



, Thickness of rocks of 136 



, Topography of 123 



Series, Absence of volcanic ash from ... 1 00 



, Agate Bay group of 116,145,187 



, Alterations of diabase of 106 



oli vinitic diabase of 108 



, Amygdaloids of 110,116 



, Amy gdules of amygdaloids of 117 



, Anorthite rock of 97,105 



, Ashbed-diabase of 108 



.Ashbedsof 98 



, Augitc-syenite of 100,111,114 



, Basic rocks of 97,101 



Page. 

 Keweenaw Series, Chronologic relation of 



eruptive rocks of 100, 128 



, Classification of basic rocks of 102 



, Coarse gabbros of 122, 124 



.Comparison of basic eruptivos of, 



with those of the Huronian 172 



.Composition of . 97 



, Conglomerates of 98 



.Contact of, with western sandstone 



in Douglas County, "Wis 150 



, Copper deposits of 180 



, Cupriferous araygdaloids of 181 



conglomerates of 180 



veins of 183 



.Detrital rocks of 97,114 



.Diabase of 97 



, Diabase-porphyrite of, described 108 



, Different views as to the relations of, 



to eastern sandstone 152 



, Dikes of 100, 124 



, Distribution of upper division of. ... 132 



, Duluth group of 134 



.Effect on topography of basic rocks of 123 



, Extent and general nature of 95 



.Felsitesof 100,111,113 



, Fluidal texture in amy gdaloids of . . 118 



, Formation of coarse gabbros of 125 



.Gabbroof. 102,104 



, General stratigraphy of 132 



, Geologic position of '. 173 



.Granite of 100,111,114 



, Granitellof 111,114 



, Granitic porphyry of 100, 111, 114 



, Hornblende-gabbro of 105 



in Canada 95 



, Indications of flowage in acid rocks of 126 



, basic rocks of 120 



in Michigan 95 



Minnesota 95 



theNipigon Basin 96 



, Intrusive augite-syenite of 125 



, granite of 125 



in Wisconsin 95 



, Lateral extent of basic flows of 121 



, Lava flows of 97,100 



,Lithologyof 101 



, Olivine-diabase of 102,107 



, Olivine-free diabase of 106 



, Olivine-gabbro of 102 



, Olivinitic diabase or melaphyr 107 



on the north and east coasts of Lake 



Superior 140 



south shore of Lake Superior . . 139 



, Original acid rocks of . 99, 111 



.Origin of acid rocks of 130 



, basic rocks of 120 



, coarse gabbro of 125 



, detrital rocks of 100 



, Orthoclase-f ree diabase of 102 



, Orthoclase-gabbro of 104 



, Proof of contemporaneousness of 



basic rocks of 121 



, Pseudamygdaloids of 106, 116 



, Quartziferous porphyry of 99, 111, 113 



