MODIFIED DRIFT OF THE LAKE DISTRICT. 125 



Round bay, .5 square miles. 501 feet. 



Long bay (of same height with Winnipiseogee lake), 1.9 " 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, 

 arc 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 lo 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 



