CONTENTS. 7 



Chapter III. — The Archean — Continued. Page. 



Section IV. Granites 246 



General statement 246 



Age of the acid intrusives 246 



Granite of Vermilion Lake 247 



Distribution, exposures, and topography 247 



Distribution :. 247 



Exposures 247 



Topography 248 



Petrographic characters 248 



Macroscopic characters 248 



Microscopic characters 250 



Folding 250 



Structural features and metamorphism 251 



Sericite-schists 253 



Chlorite-schists 253 



iSchistose granites and schists derived from granites 253 



Relations to adjacent formations 254 



Eelations to Lower Huronian series 254 



Interrelations of granites of Vermilion Lake 254 



Interesting localities 255 



Localities showing relation between granite of Vermilion Lake and 



Ely greenstone 255 



Eelations of the acid intrusives to the Soudan formation 256 



Relations of the different varieties of the acid intrusives of Vermilion 



Lake to one another 257 



Granites of Trout, Burntside, and Basswood lakes 258 



Distribution, exposures, and topography 258 



Distribution 258 



Exposures 258 



Topography 259 



Petrographic characters 259 



Macroscopic characters 259 



Microscopic characters 260 



Relations to adjacent formations 260 



Relations to Ely greenstone 260 



Relations to other intrusive rocks 261 



Age 261 



Folding 262 



Interesting localities 262 



Granite between Moose Lake and Kawishi wi River 263 



Distribution and exposures 263 



Distribution ' 263 



Exposures 264 



Petrographic characters 264 



Relations to adjacent formations 264 



Relations to Archean 264 



Eelations to Lower Huronian 265 



Relations to Keweenawan 265 



Granite of Saganaga Lake 265 



Distribution, exposures, and topography 266 



Exposures 266 



Distribution 266 



Topography 266 



