39 



feet of drift, or about to sea level, before reaching rock. A 

 large part of the material was reported to be sand. 



Approaching the moraine north of Richmond Hill, the 

 drumloid forms disappear and the plain merges smoothly 

 into the southern slope of the moraine. This slope is 

 notably smooth and lacks the hummocky surface which 

 usually characterizes terminal moraines. The southern 

 margin takes this form all along from King southward to 

 Maple and then northeastward and eastward for ioo miles. 



A Pond and Morainic Topography in the Northern Moraine, Looking South 

 Three Miles 'West of Aurora. 



This smooth slope is the side on which the ice front rested 

 while building the moraine. The moraine, therefore, faces 

 northwest and north, its north side being its front slope and 

 its south side its rear. 



On reaching the summit of the ridge this and the north- 

 ward slope are found to be more irregular and hummocky 

 than the south slope, more characteristic of ordinary ter- 

 minal moraines. There are many knobs and basins, and 

 within two miles there are three moraine lakes and several 

 similar hollows that do not now contain lakes. The car 



