HAETLAND-MONTVILLE SYSTEM. 155 



more easily have entered at the southern base of Hogback Mountain. On the 

 down slopes in this part of its course the system is somewhat discontinuous. 

 Near where the system enters the valley of the east branch of the Muskin- 

 gum Stream it expands into a plain of reticulated ridges, with an outlying 

 bar directed toward the southwest, but I could find no prolongation of 

 the system in that direction. Just north of this plain lies a narrow, almost 

 V-shaped, valley, bordered by rather steep cliffs of till. No ordinary stream 

 flows in the valley, except the merest brook, and the appearances are as if 

 the glacial river had here eroded the till. The gravel system here turns 

 east and crosses the road leading up the valley of the east branch, and then 

 becomes a prominent feature of the valley southward to the settlement in 

 Montville known as the "Kingdom," being alternately on the east and west 

 sides of the road. The gravel aj^peaj'S like a rather level terrace at the side 

 of the stream, but there is no corresponding terrace on the east side of the 

 valley. Well-rounded bowlderets and bowlders aboiuid in the gravel and 

 at once betray the glacial origin of the deposit. Near the "Kingdom" the 

 gravel expands into a large plain — the Liberty Plains — which nearly fills 

 the broad level valley, in the midst of which lies Trues Pond. One tongue 

 or expansion of these plains reaches from near Libert)' Village southeast- 

 ward almost to South Mont\'ille, but the principal expansion is south and 

 west, and this seems again to divide into two parallel plains inclosing- 

 between them Stevens Pond and then continuing on southwestward through 

 Liberty into Appleton. Near the "Kingdom" and Liberty Village these 

 plains consist of broad reticulated ridges of very coarse matter, inclosing 

 kettleholes and even lake basins. Southeast toward South Montville they 

 become rather level on the top and finer in composition, while the long 

 narrow plains which extend southwestward into Appleton show very clearly 

 the transition from coarse sediments on the north to fine on the south, char- 

 acteristic of the delta. On the south these sand plains pass by degrees 

 into sedimentary clay, which extends all the way down the Medomac Val- 

 ley to the sea. The more level portions of the gravel-and-saud plains of 

 Liberty and Appleton are thus proved to be marine delta-plains. In the 

 narrow valley of the west branch of Greorges River at South Montville no 

 sand or gravel appears for about one-fourth of a mile. Then begins a delta- 

 plain extending about one-half mile eastward toward Searsmont, and then 

 sending out a long- tongue southwestward for about 3 miles into Appleton. 



