138 GLACIAL GEAVBLS OF MAINE. 



LOCAL ESKEKS IN JACKSON. 



A ridge of subangxilar glacial gravel extends about one-fourth of a mile 

 north from Jackson Village. About 2 miles east of the village is a plain 

 nearly 1 jnile long and one-fourth mile wide. It is near Fletchers Mill, on 

 Marsh Stream. Another similar plain is found near Marsh Stream at the 

 mouth of Emery Brook, about 2 miles west of Monroe Village. The gravel 

 of these small plains is coarser on the north and west; they are probably 

 deltas deposited in the arm of the Penobscot Bay which once extended for 

 many miles up both branches of Marsh Stream. 



The till in Jackson shows a great variety of heaps and ridges, jjrobably 

 owing to the fact that Jackson lies just south of the high hills of Troy and 

 Dixmont. 



WALDO-BELFAST BAY SYSTEM. 



This is a short series, consisting of short and broad ridges or plains, 

 also of domes or mounds of glacial gravel. The system begins in the north- 

 eastern part of Waldo and extends southward along the valley of Westcott 

 Stream to City Point, at the head of Belfast Bay. Toward the south the 

 dejiosits continue to grow smaller, and the last of them that is now above 

 the sea is only a small hummock, not more than 75 or 100 feet in diameter 

 at the base. The system is discontinuous throughout its whole course. 



It is 6 miles long. 



BROOKS-BELFAST SYSTEM. 



This is a discontinuous series. It appears to begin in the northeastern 

 part of Brooks, perhaps extending into Jackson. It crosses the valley of 

 the south brancli of Marsh Stream about 1 mile east of Brooks, here being 

 joined by a short branch from the northwest. It then goes up and over 

 the hills by the same pass in which the Maine Central Railroad is con- 

 structed, and its course lies near the railroad in the valley of Westcott 

 Stream to Waldo station. The railroad here turns eastward and follows 

 the lower valley of Westcott Stream, while the gravel takes a straight 

 course southward past Evans Corner to near the Head of the Tide, Bel- 

 fast. Near Waldo station the_ series takes the form of, broad ridges and 

 rather level-topped plains bordered by marine clay. These are apparently 

 delta-plains, but since they do not spread out in fan shape, as they could 

 easily have done if the glacial river flowed into the open sea, they must 



