MODIFIED DRIFT OF THE LAKE DISTRICT. 125 
Round bay, . é 5 .5 square miles. sor feet. 
Long bay (of same height with Winnipiseogee lake), 1.9 ef 513“ 
The east and north shores of Little bay and the south and west shores 
of Sanbornton bay north to Mohawk point, with the river between them, 
are destitute of modified drift; but it is found on the east shore of San- 
bornton bay, extending along the railroad from Ephraim’s cove to Winni- 
squam station at the bridge between this and Great bay. This deposit 
consists principally of gravel, much of it containing pebbles a foot in 
diameter, and it has a height of 10 or 20 feet above the bay. Its origin, 
and the cause of its accumulation along this margin of the bay, appear to 
be shown by the kame of coarse gravel, from 10 to 15 feet in height, 
which forms Mohawk point, and is connected with the east shore by a 
low bar of gravel and sand. On the west side of the bay, opposite Mo- 
hawk point and only a short distance from it, a higher bank of the same 
gravel occurs. These kames appear to have been formed in the channel 
of a glacial river, which came down from the north-west at a time when 
the ice covered the greater part of this bay. It had been melted away 
only along the east shore, which therefore received from this and other 
streams a border of modified drift. The sand plain, about 20 feet in 
height, which extends along the west side of the bay for a mile north 
from these kames, was brought down from the same direction after the 
ice had retreated from this area. 
The next deposit of modified drift that we find is the sand plain on 
which the south part of Laconia village is built. This is about one third 
of a mile square, and from 15 to 20 feet above Great bay. One half mile 
farther north a small deposit of gravel and sand is crossed by the railroad 
on the south-east side of Round bay. No modified drift was seen at 
Lake Village, and the hills rise steeply on each side. In digging for foun- 
dation for the dam and mills here, sand is said to have been found under 
sixteen feet of till, This sheltered situation has probably preserved a 
remnant of alluvium, which was deposited before the glacial period or dur- 
ing some temporary withdrawal of the ice. A half mile north-east from 
Lake Village we come to a sand plain, from 10 to 20 feet in height, which 
extends a half mile to the north and east. Before the ice-sheet was melt- 
ed away at the Wiers, the waters from the lake had their outlet at this 
place, passing over the low water-shed on the east near Lily pond. On 
