588 



AN OUTLINE OF THE GEOLOGY OF ONTARIO. 



strata with bedded traps, etc., apparently belonging to the second 

 Copper-bearing series. The Sault Ste. Marie sandstones must, at 

 least, be as old as the Chazy series of strata, if not older; and conse- 

 quently, if the rocks on the east side of Lake Superior belong really 

 to the Copper-bearing group, they cannot be far removed from the 

 base of the Silurian series. Other arguments in support of this view ' 

 might also be brought forward. 



Finally, it m.ay be observed that Glacial striee occur more or less 

 everywhere on the harder rocks throughout this region; and boulder 

 clays, with Post-Glacial sands and other deposits, forming in places 

 high ridges or terraces, are of very general distribution. Many of 

 the rivers of Lake Su.perior and Lake Huron flow through alluvial 

 tracts, in some cases, as on the lower course of the Kaministiquia, of 

 considerable width and good fertility. 



