COMPLEX IN YORK AND OXFORD COUNTIES. 259 



assortnent of sediments characteristic of the delta-plaiu, and this broad 

 and level valley near East Brownfield was at one time occupied by a lake, 

 or a river so broad as to resemble a lake. The third diverging branch 

 turns southwest and goes up the main Pequawket Valley for somewhat 

 more than 2 miles, when it again parts into two series, one of which goes 

 nearly south over a high hill and thence to Porter Village, while the other 

 ascends a hill toward the southeast and, when near the top of a pass situ- 

 ated at the northern base of Pine Hill, unites with the series which follows 

 the south branch of the Pequawket Stream. The united series now con- 

 tinues southeast through the pass and descends 180 feet into a valley open- 

 ing eastward. By following down a rather steep slope in this valley the 

 glacial river might, within 2 miles, reach the very large glacial river which 

 flowed southwest from East Brownfield to Kezar Falls along the valley of 

 Tenmile River and through the remarkable valley in the western part 

 of Hiram called The Notch. Instead, it turned at a right angle southward 

 and climbed a hill 180 feet high. On the top of this hill the river was in 

 a situation interesting to study. Right in front of it is a valley leading 

 southeast into The Notch, and by taking this route the glacial stream might, 

 within 2 miles, have joined the glacial river just mentioned at a point 250 

 feet or more lower than its position on the hilltop. Instead of following 

 this valley along a down slope, the glacial river turned soiithwest, and for 

 an eighth of a mile flowed directly on the top of the ridge, and then crossed 

 a north-and-south hill over a col 30 feet high. The gravels are somewhat 

 discontinuous south of this point, but can readily be traced along the 

 western slopes of this hill to Kezar Falls. 



The above description applies to an area only about 10 miles long 

 from north to south. A minute description of the branchings and reticula- 

 tions and other developments of the Saco-Mousam network of gravel plains 

 must be omitted. 



But there is one line of gravels that demands further notice. The 

 Notch, in the western part of Hiram, is a very low valley with U-shaped 

 cross section. The level portion at the bottom is usually not more than 

 one-fourth of a mile in breadth, and at the highest part of the pass it is 

 hardly an eighth of a mile wide. From this point two streams flow in 

 opposite directions. One of them is a branch of Tenmile River, and 

 flows northeastward into the Saco River; the other flows southwestward 



