238 



IRVING B. CROSBY 



stratified drift. If all this drift were removed from these valleys, 

 there would be a broad valley, ample for a large river, connecting 

 the Androscoggin with the Connecticut. 



Northeast of Berlin is a nearly level plain, rising gradually to 

 the southeast and ending abruptly against the Mahoosuc Range. 



Fig. 3.- — Map showing present and former drainage lines about Berlin, Dummer, 

 and Milan, New Hampshire. 



Former Drainage Lines 



Several streams flow northwesterly across this plain and enter the 

 Androscoggin with retrograde courses. The descent from the 

 plain to the Androscoggin at Berlin is abrupt, indicating that 

 the river has been rejuvenated enabling it to lower its bed faster 

 than is possible with the smaller streams. 



