30 SURFACE GEOLOGY, 
than the corresponding terrace opposite, on which Newbury is built. 
This difference may be partly due to the fact that here was one of the 
principal outlets of the melting ice-sheet that continued to cover Moosi- 
lauke and the high water-shed after it had withdrawn from the Con- 
necticut valley. East from North Haverhill, where there are now only 
insignificant brooks, we find an abundance of sand and coarse gravel 
which came from this source. It is disposed in irregular slopes, in some 
portions mounded or ridged, and rising in about one mile 250 feet, beyond 
which the same materials extend nearly level to French pond. Taking 
the road to Haverhill town-house, we pass a ridge of coarse gravel or 
slightly modified drift, which rises from 40 to 100 feet above the village. 
North-east from this there is a nearly level plain of fine alluvium, with 
beds of clay. A short distance farther east we come to a sand ridge, 
which extends about a half mile along the road, rising 80 feet by a gentle 
slope, and then abruptly 75 feet more, like the face of a terrace, to a level 
plain on which the town-house stands, 247 feet above North Haverhill 
and 752 feet above the sea. This plain, its western steep slope, and the 
first ridge below are all of sand, with none of the coarse gravel charac- 
teristic of kames. Similar deposits of fine material reach for a half mile 
on each side of this road, sometimes in level plains of small extent, but 
generally in varying slopes, by which they are continuous from the town- 
house to the upper terrace of the river. 
The remainder of the way to French pond is comparatively level, being 
at first a plain of stratified, coarse-grained sand, which extends north one 
half mile to the brook; thence, for a mile and a half farther, sand or 
coarse rounded gravel extends along the road and on its east side as far 
north as to French pond. Immediately about this pond the modifying 
action of water is not apparent, but the surface is composed of heaped 
and ridged morainic drift, over which the road passes. This material is, 
however, in the main, level; with irregular hollows and depressions of 
only ten to twenty feet. Its rock-fragments are angular, but small in size, 
seldom exceeding two feet. A coarse morainic ridge extends more than 
a mile on the east side of this level alluvial valley, with a height about 
125 feet above it, while on the west rises the precipitous face of Brier 
hill, Three miles south-east are the serrated mountains which extend 
north from Owl’s Head; and nine miles south-east is the high, massive 
ridge of Moosilauke. 
