KETTLE-HOLES. 6f)9 



probiil)lo i)ositiou of the old bed of the Connecticut. The great southwjird 

 bend of Millers River extends into this line for a distance, and the stream 

 wore freely in this direction, because from the depth of the old channel 

 it found liere no rock to obstruct it, while all around the rock rises to a 

 much greater level. 



A depression in the plain connects this basin with the great kidue}^- 

 shaped Green Pond, with banks 30 feet high, as steep as sand will lie, and 

 with about 25 feet depth of water. On the south the bank breaks down 

 and a low col connects it with the much larger pond, Lake Pleasant, with 

 similar banks and a de^jth of water of 37 feet, as measured for me by Mr. 

 F. A. Rugg, a former pupil. From its south end rmis a depression whose 

 contours have been changed by the Ijrook which runs in it and drains the 

 lake. 



In Belchertown the sections made b\- the Central l\ailroad cut through 



>\ I '"? ^^^ s 



FiQ. 42 Section of north half of atettle-holebelowDwight's station on the Central liailroad, Bi-lcberto^vn. 



many interesting kettle-holes north and south of the Belchertown ponds, 

 which ponds themselves belong to the same class of sink-holes. They 

 belong to the deposits of the Pelham River (see p. 588), and are tluis of 

 slightly greater age than the foregoing. 



Fig. 42 gives a sketch of a portion of the second cutting below Dwight's 

 station at the "Big Fill." It is carried along the slope of the terrace, and 

 the jagged line in the middle of the figure is explained by the fact that the 

 cut of the New London Northern Railroad is just east of and parallel to 

 this and the crest caved between them, so that only a few of the teleg-raph 

 poles remained. 



The cutting showed the cross section of two submerged kettle-holes. 

 The heavy line commencing at a is the surface of the sink-hole, and it is 



