202 W. Upham—Terminal Moraines ae 
with occasional bowlders, indicates that it was of similar origin 
with the hills of modified drift in the two moraines between 
which it lies. During the retreat of the ice-sheet it would 
appear that exceptionally large deposits were accumulated by 
its rivers here and at Gardiner’s Island. 
The continuation of the second moraine beyond Orient Point 
is to the east-northeast in Plum and Fisher's Islands, and from 
Watch Hill through the south part of Westerly, Charlestown 
and South Kingstown in Rhode Island, to near Point Judith. 
On Plum Island it forms hills about 100 feet high, abundantly 
covered with bowlders; but a considerable tract on the south 
side of this island is a low plain of modified drift, free from 
bowlders and sloping southward. Gull Island is a remnant of 
_ this plain which was formed in front of the terminal moraine. 
Fisher's Island, about seven miles long, is a conspicuous rem- 
nant of the moraine, being composed of the same coarse glacial ° 
drift with Brown’s Hills and Plum Island. Its elevations vary 
from 100 to nearly 200 feet in height, the most prominent being 
- Mount Prospect, North Hill, and Chocomount. Portions of 
the low plains are preserved on its south side for a mile from 
its west end, and again fora third of a mile between two ponds 
near the middle of the island. 
east and east from Perryville, several ponds occur among the 
hills, ridges and knolls of the moraine. At this part of its 
