ao8 Ol ! 1 1 LD-GEOLOGY PARTI 



(p. 119) to the extraordinary group of primeval moun- 

 tains now in course of exposure by denudation in the 

 north-west of Scotland. The observer may often en- 

 counter on a more modest scale traces of old v 

 which have been buried under the glacial drift, and have 

 been brought to light in recent times by the wrarini; 

 down of the overlying deposit. Fig. 85 represents a 

 section cut by a small stream in the Old Red Con- 

 glomerate near Fochabers, in the north of Scotland. 

 It will be seen at once that the hollow existed before 

 the boulder-clay was laid down in it. But rain and 

 runnels have already cut through the drift which is 

 now reduced to fragments, capping the columns into 

 which, by the same agents, the conglomerate has been 

 carved. 



