1880.] 449 (Stone. 
clays; at one time I mistcok this terrace for a beach of the Champlain 
sea. Further exploration shows that it ends abruptly on the north and 
east and that there is nothing like it for several miles in that direction, 
hence it cannot be a beach. The surface layers of this plain or terrace 
contain many large pebbles while below there is for the most part fine 
sand or gravel. About two and a half miles southward from its 
source there is a short break in the system and the kame then re- 
appears not as a terrace along the side of the high hill but as a ridge 
in the midst of the valley. This valley is narrow and bordered by 
frequent hummocks and ridges resembling lateral moraines. During 
. the Champlain period it was probably a strait connecting the Sebas- 
ticook bay with the open sea and if so would be swept by powerful 
tidal currents. The kame crosses a low col and extends in nearly a 
straight line to the Sheepscot river near Week’s Mills, where it expands 
into broad sand and gravel plains partly overlain by the non-fossil- 
iferous marine clays. From here an interrupted series of gravels 
extends dewn the Sheepscot to join the main kame in Whitefield. 
Length 20 miles. 
XVIII. Eastern Kennebec Valley System. 
A series of kames begins abruptly at Somerset Mills, and is a well 
defined system as far south as the head of Swan Island. Its course 
lies near the Kennebec River, which it several times crosses. In 
Fairfield, Waterville and Gardiner it is for the most part on the 
western side of the river, in Vassalboro and Dresden on the eastern, 
while in Augusta and Hallowell it expanded into a series of parallel 
and interrupted ridges, a part of which lie on each side of the river. 
South of Dresden the system is represented by only a few occasional 
ridges which thus far have been traced to Abagadassett Point in 
Merrymeeting Bay. Probably the course of the system here fol- 
. lowed the river, and the gravels have been in great part washed 
away. Many sections along the course of the kame show marine 
sands and clays overlying the kame. 
Length 50 miles. 
XVIII m. Canaan — Clinton Kame. 
Nowhere a large ridge. Is quite discontinuous north of Canaan, 
and south-west of Clinton, where it seems to have been almost 
wholly washed away by the Sebasticook river. It probably joined 
XVIII at Winslow. North of Clinton this series well displays the 
action of the sea upon the Kames. Length 15 miles. 
PROCEEDINGS B. 8. N. H. — VOL. XX. 29 JUNE, 1881. 
