Trans, of Can. Inst. 

 Vol. X. Map 1. 



This map shows the ter- 

 minal moraines of south- 

 western Ontario, so far as 

 they had been mapped in 

 1912. Those shown in the 

 heavier color were laid 

 down at the margin of the 

 ice on land and are known 

 as landlaid moraines ; those 

 in lighter color were laid 

 down at the margin of the 

 ice in water and are called 

 umterlaid moraines. Some- 

 times the distinction is diffi- 

 cult to make, but waterlaid 

 moraines are generally 

 lower, smoother and weaker 

 in their development than 

 the landlaid form. The 

 long arrows show the direc- 

 tions and axes of the 

 greater ice streams when 

 the ice was at its maximum 

 extent ; the smaller, broken- 

 line arrows show the direc- 

 tion of movement of the ice 

 towards the moraines at the 

 margins of the lobes. The 

 direction was generally nor- 

 mal (o the trend of the ter- 

 minal moraines or nearly 



