FORMER COURSES OF THE ANDROSCOGGIN RIVER 



239 



There are remnants of a bed-rock bench at an elevation of 

 approxunately 1,200 feet on the valley sides south of BerHn. At 

 Gorham the elevation of the bench remnants is 1,300 feet (i in 

 Fig. 4),^ and two miles to the east their elevation is 1,400 feet 

 (2 in Fig. 4). The smnmit of Mount Winthrop (5 in Fig. 4), a 

 long spur projecting into the valley five miles east of Gorham, 

 has an elevation of 1,575 f^^t. 



Fig. 4.— Mew eastward from Pine ^Mountain, Gorham, Xew Hampshire 



Looking eastward from Mount Winthrop, long, even-crested 

 ridges extend into the valley; and two with elevations of about 

 1,100 feet appear completely to block the valley. These are e\'i- 

 dently remnants of the floor of a valley which descended to the 

 east from a divide where ]\Iount Winthrop now is. 



The series of bench remnants rising to the east from Berhn and 

 culminating at ]Mount Winthrop mark the level of an old valley 

 which extended from the valley now occupied by the Upper Ammo- 

 noosuc to a low pass at Mount Winthrop. 



Observations from ]\Iount Winthrop give indication of an old 

 land surface descending on either side. On the opposite side of the 

 present valley are benches which correspond to IMount Winthrop 



' From a photograph by the Shorey Studio, Gorham, New Hampshire. 



