164 GLACIAL GRAVELS OF MAINE. 



within a mile farther, near Nobleboro Post-Office. The three gravel plains 

 south of Muscongus Bay have a linear arrangement; probably they all are 

 deltas, and they may have been deposited by the same glacial stream. 

 Whether they are connected with the East Jefferson gravels is uncertain. 

 Two other small gravel plains are found in Nobleboro north of Duckpuddle 

 Pond. A small ridge of glacial gravel is found near the west shore of 

 Damariscotta Great Pond, about 3 miles north of the south line of Jeffer- 

 son; and 3 miles farther north another small ridge is found on an east-and- 

 west road. All of these local gravels are found in a region that was under 

 the sea. Old bea,ches abound in the same region, and it requires some care 

 to distinguish the glacial from the beach gravel. 



DYERS RIVER SYSTEM. 



A very discontinuous system seems to begin in Jefferson, west of 

 Dyers Long Pond, and extends southward about 4 miles along the valley 

 of Dyers River. It then passes obliquely out of the valley southeastward 

 into a rolling plain near 1 00 feet above the stream, and appears to end near 

 Great Meadow River in Newcastle. So far the system is pretty well 

 defined. About 2 miles from the north end of the system, as above 

 described, are two short gravel ridges, and a mile farther north, at West 

 Jefferson, is a gravel-and-sand plain one-half mile long and a full eighth 

 of a mile wide. This is probably a marine or lake delta. A trotting track 

 has been made on it. One mile northwest of West Jefferson are two short 

 but good-sized ridges, and 2 miles north of them are two small ridges, in 

 the vallev of the west branch of the Sheepscot River. Two miles farther 

 north is a small gravel deposit, near Coombs's store in Windsor. All of 

 these last-named gravel deposits have a linear arrangement and are situated 

 along a route level enough for the passage of a glacial river without its 

 having to cross hills higher than about 100 feet, but the gaps between the 

 gravels are so long and the deposits so small that it is uncertain whether 

 they were deposited by the same glacial stream. Most of the deposits of 

 Dyers River system, as well as the very widely separated gravels north of 

 them, are situated on the tops of hills, or on their flanks, 50 or more feet 

 above the adjacent valleys. The gravel is all pretty well rounded. 



Its leugrth is 12 miles. 



