of masses of granite rock, and by the natural ciumpling or 

 folding of the earth's surface, which is still going on, and 

 which in former times assumed very great prof)ortions. 



The rocks of the Huronian are the mineral-bearing rocks, 

 or at least contain veins of various kinds, having gold and 

 other minerals of value. It has been the custom to connect 

 these veins in some way with the changes resulting from the 

 intrusion of the granite near by. 



A study of tiie rocks of the Huronian on the Lake of the 

 Woods shows that the belt of rock has been crumpled up into 

 hve ridges, which the geologists call anticlinals, and that these 

 run either northeast or southeast across the upper portion of 

 the lake. 



1. The most southern of these anticlinals is shown in a 

 series of Laurentian islands, such as Bigsby, Big, Massacre 

 and Cornfield islands, and leading over to Driftwood point on 

 the west shore. 



2. The second great ridge, enormous indeed in propor- 

 tions, includes the great dividing peninsula of the lake, 

 known as the " Grande Presqu'ile," which, leading through 

 Falcon Island, passes to the opening made by the northwest 

 angle. 



3. The next anticlinal was that formed by the eastern 

 peninsula, pointing northwestward, and connecting by islands 

 with the western peninsula at Crow Rock channel. 



4. The fourth anticlinal, or ridge, was that traced along 

 Pipestone Point and three islands, viz : Hay, Middle and 

 Scotty Islands, and it may be mentioned in passing that this 

 is an important neighVjorhood. This line of direction leads to 

 Point Aylmer, on the outer extremity of the northern 

 peninsula. 



5. The fifth and most northerly of the original ridges is 

 a short distance from the town of Rat Portage, starting from 

 the well-known Devil's Gap, and leading by islands across to 

 Dispute Point. 



These four most northerly ridges diminish in size from 

 south to north., and each time become smaller in width until 



