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FIRST TEAR SCIENCE 



metrical and without order. The whole surface is a 

 hodgepodge of glacially dumped material, a terminal 

 moraine country. 



Further back from this morainic dumping ground may 

 be found other kinds of glacially deposited material. If 

 a glacier is pushing along under it a mass of material and 

 it meets some obstruction, or if on account of melting or 

 a decrease in the rate of its flow it has not the power to 

 carry its load, it deposits a part of it. The ice slides over 





AN ESKKR. 



the deposited material and rounds it off, but leaves it as a 

 river leaves its sand bars. 



But this material is not stratified, like the material left 

 in water. When the glacier melts away, these rounded 

 deposition heaps are left as hills of greater or less height. 

 Since the material forming them has been continually 

 brought from the direction from which the ice came, they 

 will have their greatest extension in that direction. Such 

 hills have received the name drumlins. 



Where there are stream channels in the under surface 

 of the ice, the streams may aggrade or rill up their beds 



