MODIFIED DRIFT ALONG CONNECTICUT RIVER. 



39 



but no prospect of water, which caused this site, selected for the buildings 

 of Dartmouth college, to be abandoned, and led to their location farther east, 

 upon coarse glacial drift. This log was at nearly the same level with the 

 clayey stratum described, and adds to our knowledge of the conditions 

 which prevailed at the time of its deposition. The glacial age had here 

 been succeeded by a temperate climate, under which forests grew again 

 upon the land ; and floods, sent out freighted from the melting ice-sheet, 

 which still remained farther north and on the highlands, brought down 

 drift-wood to be buried with this alluvium. It was not till long after this 

 that the river ceased its work of accumulation and began to cut its pres- 

 ent channel. 



Veins of segregation in sand, attended in some instances by a slight 

 displacement or fault, are well displayed at the present time by the fresh 



Kame. 



515- 



375 ft. above : 



Fig. 9. — Section on south side of road, east from Ledyard Bridge, 

 Hanover. Length, about 700 feet. 



washing away of the bank, a portion of the high plain, on the south side 

 of the road between Hanover and the depot. These veins abound for 200 

 feet or so east from the kame, a good section of which is also shown here ; 

 they are in somewhat obliquely stratified sand, which inclines conformably 

 where it overlies the side of the kame. 



Between Hanover and White River Junction the Connecticut descends 

 40 feet, principally at White River falls (vol. i, pp. 302* and 319), situ- 

 ated two miles above the mouth of White river, and three miles above 

 that of Mascomy river. An illustration of the terraces on the west side 

 of these falls, as seen from Colburn hill in Lebanon, appears in Dana's 

 Manual of Geology.^ The upper terrace is wide, with a height 525 feet 



* The survey for this map was made when the river was above its ordinary height, which is at Hanover 373 

 and at White River Junction 333 feet above the sea. 

 t First edition, p. 548 ; second edition, p. 544. 



