128 



PHYSIOGRAPHY 



and depositing in others. As a result of all these phases of water- 

 work, much of the drift is stratified. 



Icebergs 



Icebergs (Fig. 114) are masses of ice broken off from the ends 

 of glaciers which move down into the sea. Bergs derived from 

 Greenland float as far south as Newfoundland in considerable num- 



! MILE. 



Fig. 135. A group of kames near Connecticut Farms, N. J. (N. J. Geol. 



Surv.) 



bers. They are seen occasionally still farther south, but by the 

 time they have moved so far from their source they are usually 

 small. The bergs from Greenland rarely project 200 feet out of 



