GLACIAL DRIFT. 293 
very irregular outlines of the surface; but we have been unable to dis- 
cover this relation or dependence, if any exists. In the northern por- 
tion of the area explored, the till is common in patches and extended 
sheets, but forms only few and scattered lenticular hills or slopes. Far- 
ther south, these remarkable accumulations occur quite abundantly upon 
three belts of our territory, one of which extends through the west part 
of Cheshire county; another, from Goffstown and Weare south-west to 
New Ipswich and Rindge; and the third, through eastern Rockingham 
county. The general features of these lenticular deposits of till, which 
have been already given, apply to them in all parts of the state where 
they have been found, and also in north-eastern and central Massachu- 
setts, leaving little that needs to be particularly mentioned, except the 
localities of their most conspicuous or noteworthy occurrence. 
Sullivan County. The glacial drift does not form many prominently rounded masses 
in this part of the state. A lenticular slope of till, resting against higher ledges at the 
north, was observed two miles west of Meriden on the north side of Blow-me-down 
brook. Even such deposits are rare in most of the towns of this county. Southward, 
lenticular accumulations of till were noted on both sides of Sugar river one to two miles 
east of Claremont. The first of these on the north side of the river falls off abruptly 
at its south-east end, having evidently been undermined by this stream, which now 
flows thirty rods distant, separated by a low flood-plain. No lenticular masses were 
seen in Newport, but considerable till is spread out in flattened sheets. For fully a 
mile in the west part of this town, beginning a little below Kelleyville, such a deposit 
has been undermined by Sugar river, and forms a continuous bluff on its north side 75 
to 100 feet high. The slope southward from Acworth centre to Cold river, amounting 
to about 500 feet in two miles, is principally covered with till, much of which is massed 
in rounded hummocks with several lenticular hills near the bottom. At the northward 
bend of the river, a half mile west of South Acworth, it forms a bluff roo feet high 
The ascent on the south side of the valley towards Alstead is also marked by frequent 
patches of till.* 
Cheshire County. In the west and south-east parts of Cheshire county the lenticular 
hills are finely developed, but they are almost entirely wanting over an intervening area 
which averages ten miles in width. At East Alstead, and fora mile to the north and 
east, the surface is mostly till, which occurs in broad swells, resembling lenticular ac- 
cumulations. Well marked examples of ‘‘crag and tail” occur one mile north-east and 
a mile and a half east-north-east from this village, the latter example being in the edge 
of Marlow. Many fine lenticular hills occur in the south part of Walpole, scattered 
among more prominent hills of ledge. Ata mile and a half south-east from the village, 
the road which leads north from school-house No. 4 climbs a rounded slope of till nearly 
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