8 CONTENTS. 



Chapter III. — The Archean — Continued. Page. 

 Section IV. Granites — Continued. 



Granite of Saganaga Lake — Continued. 



Petrographic characters 266 



Macroscopic characters 266 



Microscopic characters 267 



Eelations to adjacent formations 268 



Kelations to Ely greenstone 268 



Eelations to Lower Huronian sediments 268 



Metamorphic effects of the granite of Saganaga Lake 273 



Interesting localities 273 



Chapter IV. — The Lower Huronian 275 



Section I. Sedimentary rocks 275 



Occurrence and subdivisions 275 



Vermilion Lake area 277 



Distribution, exposures, and topography 277 



Distribution 277 



Exposures 278 



Topography 278 



Structure 278 



Eelations of the Ogishke conglomerate and Knife Lake slate .' 281 



Eelations to adjacent formations 281 



Eelations to Archean 281 



Eelations to Giants Eange granite 283 



Eelations to basic dikes 283 



Age 284 



Ogishke conglomerate 284 



Petrographic characters 284 



Macroscopic characters 284 



Origin of the conglomerates 285 



Thickness 286 



, Interesting localities 287 



Knife Lake slates 293 



Petrographic characters 293 



Thickness 295 



Interesting localities 295 



Knife Lake area 297 



Subdivisions 297 



Distribution, exposures, and topography 297 



Distribution 297 



Exposures 298 



Topography 299 



Structure 299 



Eelations 303 



Eelations of the sedimentary members of the series to one another 303 



Eelations of Lower Huronian sediments to adjacent formations 303 



Eelations to the Archean 303 



Eelations to Ely greenstone 303 



Eelations to the Soudan formation ..:' 304 



Eelations to the granite of Saganaga Lake , 305 



Eelations to Lower Huronian 305 



Eelations to the Giants Eange, Snowbank, and Cacaquabic granites, 



and various dikes of granites and granite-porphyry 305 



Eelations to certain basic and intermediate dikes of Lower Huronian 



age 306 



Eelations to the Upper Huronian series 306 



