during the melting of the Glacier. 431 
Direct evidence as to the actual level of the coast about the 
mouth of the Thames during the era is wanting; both because 
of the absence of a seashore terrace, and because no sections 
were exposed along the Thames that afforded a chance for 
studying satisfactorily the character of the bedding. But if 
the New London Lighthouse Point is without terraces, I have 
seen several examples of them at the head of broad bays 
between New London and Stonington, and in no case have I 
found the height over 15 feet, and generally it is but 10 or 12 
feet. Again, Fisher's Island—about seven miles in length—lies 
off this same coast, and within five miles of it; and at the head 
of West Harbor, there is a well defined shore terrace of 15 feet ; 
and, at Hast Harbor, one of less certain nature nearly 25 feet. 
25 feet is therefore the greatest height inferable from this kind 
of evidence, and 15 may meet the facts. 
5. NARRAGANSETT Bay. 
Providence is situated on Providence River within a mile of 
the head of Narragansett Bay. Its terrace, averaging 80 feet in 
height above high water, is extensive, and part of the city is 
built upon it. The river opens into the broad northern arm of 
the Bay, and affords 14 feet of water for shipping to the city. 
The Bay has passages one to three miles in width among its 
islands, and enters the Sound about 26 miles south of Provi- 
dence. With so open a passage for the waters we might infer 
that certainly the Providence terrace must mark a sea level of the 
Champlain period. But in view of the facts detailed in the 
preceding pages it is evident that something of this height is 
attributable to the flood descending the river valleys. 
T have not been able to study carefully all the shores of the 
great bay with reference to its terraces. Ten and a half miles 
south of Providence, east of Hast Greenwich, there is a very wide 
terrace-plain, which extends south toward Wickford. Near the 
railroad in East Greenwich, the height is 56 feet, showing a loss 
of 24 feet of elevation in the 10} miles from Providence. At 
Wickford, 7 miles farther south, the height is much less, little 
exceeding 80 feet. 
‘There is a terrace at Fall River, on the west shore, about 17 
miles from the Sound, and between this place and Tiverton. 
The height, just below the depot at Fall River, is 35 feet above 
high water; but the beds are very stony toward the top, and 
hence it is that the terrace is 30 feet below the normal height ; 
Some of the stones are a foot in diameter. The terrace south 
of Fall River has no greater height. About Newport there 
ap to be no well defined terrace. 
ut direct evidence bearing on the height of the region in 
the Champlain period is afforded by the coast region between 
