468  W.Upham—Northern part of the Connecticut Valley 
Two miles north of Hanover the Connecticut River has cut 
through the kame, and thence flows close on its west side to 
White River Falls. Along this distance of four miles we find 
the high plain well developed in New Hampshire, averaging 
three-fourths of a mile wide. Hanover common, 545 feet above 
the sea, and 172 above the river, represents its greatest altitude. 
In digging the first well at this place (near the residence of Pro- 
fessor H. E. Parker), a large log was found in this alluvium forty 
feet below the surface, but no prospect of water, which caused 
this site, selected for the buildings of Dartmonth College, to be 
abandoned, and led to their Jocation farther east, upon coarse 
glacial drift. This log shows that the glacial age had here been 
succeeded by a temperate climate, under which forests grew again 
upon the land; ed that floods, sent out freighted from the melt- 
ing ice-sheet, which still remained farther north and on the high- 
lands, brought down drift-wood to be buried with their alluvium. 
It was not till considerably later that the river ceased its wor 
_ of accumulation and began to cut its present channe 
Near the south line of Lebanon, east of Sumner’s Falls in 
Plainfield, and at several places in Cornish, we find banks of 
sand, or dunes, destitute of vegetation, and blown in drifts by 
the wind. These vary in height from a few feet to 100 feet 
above the highest terrace, from which they appear to have been 
carried up by the oe northwest winds. Southward 
through New Hampshire they are found in many places on the 
east side of this valley, but none were seen in Vermont. 
‘From Lyme to Windsor we find a continuous gravel ridge or 
kame, extending twenty-four miles along the middle of this 
valley, with its top from 150 to 250 feet above the river, or from 
500 to 600 feet above the sea, The gravel, which always forms 
the principal part of the ridge, varies in coarseness from layers 
with pebbles only one or two inches in diameter, to portions 
where the largest measure one and a half or two feet. The 
finer kinds prevail; and the channels of brooks cutting through 
the ridge frequently show no pebbles exceeding one foot in size. 
All the materials of this kame, and of its remnants southward, 
are plainly water-worn and stratified. 
Large and unworn bowlders, which could not have bgen 
at least of journey on foot along the top of this ridge, and the 
examination of many sections where the river or its tributaries 
