378 FIRST TEAR SCIENCE 



valleys may be much higher than the bottom of the main 

 valley. These are called hanging valleys. (See 144.) 



A U-SHAPED VALLEY IN NORWAY. 



This has been rounded out by glaciers. The moisture in the atmos- 

 phere makes it necessary to hang the hay up to dry, as seen in 

 this picture. 



The bowlders which are borne along by the ice are 

 deposited irregularly over the surface in all kinds* of posi- 

 tions when the ice melts. Some of them are very large 

 and are left perched high up on the hillsides where no 



