132 SURFACE GEOLOGY. 
river. The height of this clay is, by estimate, 350 feet above the river 
and nearly 250 feet above its highest terraces, or about 800 feet above 
the sea. A well at Mr. Plaisted’s house showed 15 feet of till underlaid 
by 18 feet of clay. A few rods farther north, at nearly the same height, 
the clay is covered by only one or two feet of till. About fifteen rods 
farther north-west, on the steep hillside and some 30 feet higher than 
the foregoing, a small excavation for brick-making shows a bed of clay 
ten feet thick, and probably extending deeper, overlaid by two feet of till. 
This clay is free from pebbles, but occasionally shows layers of sand half 
an inch thick. Its stratification is nearly level, but slightly anticlinal, 
dipping a few degrees at the north and south sides. 
Some light is probably thrown upon the origin of these deposits by a 
section (Fig. 29) which was observed by the roadside between Ashland 
and Little Squam lake. On the surface was coarse upper till, 3 feet deep, 
showing no marks of stratification, and 
Upper till, 3 feet. 
Pebbly stratified CONnSisting of sand and gravel mixed 
clay, 10 feet. . 
Lower till. with abundant angular boulders of all 
ECTION IN ASHLAND. sizes up to four feet in diameter. Next 
was a dark blue clay, 10 feet thick, plainly stratified, but not finely lami- 
nated, and containing many fragments of rock up to six inches in diame- 
ter. Next below, and separated from the former at a definite line, was 
the compact unstratified lower till, which is here dark and clayey, and 
contains many glaciated stones up to a foot and a half in diameter. 
South of Squam bridge the steep north slope of a hill which rises from 
the shore of Little Squam lake has a layer of clay, stratified and free 
from pebbles, which is overlaid by one to three feet of till. The clay is 
four or five feet deep, but how much deeper is not known, and it is said 
to extend from near the lake shore to a height 150 feet above it. 
On the east side of Squam lake the farm of John Wiggin, in Moulton- 
borough, has frequent deposits of clay similar to that last described. At 
about fifteen rods south-west from the house and about 100 feet above 
the lake, this was used for brick-making fifty years ago. The side of Red 
hill, which rises near at hand on the east, is said to have in many places, 
to a height 300 feet above the lake, a stratum of clay underlying one to 
three feet of coarse till. On the north side of this lake the clay on land 
of the Messrs. George, in the south-west corner of Sandwich, which was 
