224 SURFACE GEOLOGY. 



country, has been passed over by this glacier as if it were of no con- 

 sequence. 



The Pemigewasset valley turns to the south below Plymouth ; but the 

 striae continue on in the direction observed in Rumney, just as if the ice 

 could not stop after it began to slide. The smallest easting in Holder- 

 ness is S. 37® E., on top of Mt. Prospect; the ridge of Squam mountain 

 shows S. 62° E.; and there are others equally pronounced. Sandwich, 

 however, shows the greatest amount of easting. At several places it 

 travelled a little north of east, and the east course is frequent. The 

 movement did not continue further east into Tamworth on the north 

 side of the Ossipee mountains, since the marks there are quite southerly, 

 though Chatham hill shows the course S. 42° E. The mass seems 

 rather to have gone south-easterly to the lake through Moultonborough, 

 and over Red hill, S. 62° E. On reaching Winnipiseogee lake the striae 

 on the east side average a more easterly course than on the west side in 

 the towns of Meredith, Gilford, and Alton. The occurrence of the Moose 

 mountains directly in the path of the Winnipiseogee ice suggests whether 

 the course was not changed on account of this obstacle in its way. It 

 is a fact, that the course on the summit of these mountains is that of the 

 longer axis of the lake, while there is a much greater easting to the north- 

 east. The striae at Tuftonborough Corner run N. 68° E., as if crowded 

 closely upon the flank of the Ossipee mountains. Nearly all the obser- 

 vations in Tuftonborough, Wolfeborough, Brookfield, and Wakefield run 

 between south-east and east. Mr. W. Upham explains this condition of 

 things, by supposing the ice of the Ossipee basin melted earlier than that 

 over Winnipiseogee, and hence the ice from the latter area moved towards 

 the vacancy left on the east side. If most of the ice were forced to pass 

 out between Ossipee and Moose mountains, a part of it might emerge 

 through Alton. The striae there have a much less easting than on the 

 other side of Moose. 



Thus it would appear that the topography of the country between 

 Warren and Wakefield, along the valley of Baker's river and Winnipi- 

 seogee lake, determined somewhat the direction of the motion of the 

 ice, whether it be regarded as a part of the continental sheet or a local 

 movement. 



Upper Pemigewasset Movement. The observations of the striae in the 



