MODIFIED DRIFT ALONG CONNECTICUT RIVER. 2$ 



road has cut through a narrow spur of this terrace, which escaped erosion 

 by water. Here the alkivium of the main valley has been excavated into 

 secondary terraces 

 by Bog brook. In 

 the south part of 

 Stratford, and i n 



Northumberland, Fig. 2. — Section in BRUNs^vlCK and Stratford. 



.-, 1 . Length, | of a mile, 



the meadow or in- & - -* 



terval occupies more space than the terrace, which has its greatest 

 extent in the level, swampy plain west of Groveton Junction. In Maid- 

 stone, for two miles north from Guildhall, low hills on the west side of 

 the valley hem in extensive swamps, which have been scantily filled with 

 alluvium of nearly the same height with the river terrace. 



Deltas. At Lancaster the upper terrace of Connecticut river is only 

 15 or 20 feet above the interval. The only higher modified drift has 

 been brought down by tributaries. Part of Lancaster village is built on 

 one of these deltas, formed by Israel's river on its south side, 50 feet above 

 the terrace of the main valley. This delta sloped rapidly westward, and 

 formerly occupied the whole area of the village ; a portion of it, 20 feet 

 lower than the former, remains at the cemetery opposite the court-house. 

 Similar deposits also occur two miles south-west from Lancaster, and on 

 John's river. 



Between South Lancaster and Fifteen-miles falls the broad river-plain 

 is unterraced. It seems probable that a lake existed here while the origi- 

 nal high plain northward was being deposited. When this was channelled 

 out by the river, so as to leave only terraces as we now see them, the 

 materials excavated were sufficient to fill up the lake. It would be inter- 

 esting to know the depth of the stratified drift in this basin ; it is proba- 

 bly deeper than the height of the highest modified drift northward above 

 the river. 



Kame-like materials of small extent were noticed at North Stratford, 

 forming the high bank on the east side of the railroad, one fourth mile 

 south-east from the depot, and in Guildhall, about two miles north from 

 Lancaster bridge. A remarkable moraine of granite boulders occurs in 

 Stratford, covering a large area of hillside just above the upper terrace, 

 one mile south from Beattie's station. Two miles north-west from 



