during the melting of the Glacter. 435 
argument for an elevation of only 10 to 20 feet is the strongest, 
although not yet decisive. 
2. The river-valley formations not marine.—The ocean took no 
part in the formation of the river terraces. The pitch in the 
terrace plains of the lower Housatonic, lower Connecticut, and 
the Thames, is alone sufficient evidence against marine action 
in the matter. 
—were not wholly, or for the greater part of their height, 
formed when the land was at a much lower level than now ; but, 
on the contrary, that they were formed when the river's waters 
4, 
valley formations above flood-level has been stated on preceding 
ages. 
pages 
The following table contains these heights, and also the cor- 
Tesponding heights above mean high-tide level. 
Above flood Above high- 
level. tide level. 
On the Housatonic, at Birmingham, 95 feet. 110 feet. 
On the Connecticut, at Middletown, 150 feet. 170 feet. 
2 $ at Hartford 160 feet. 185 feet. 
« « ot: Sanetieuiald 180 feet, 237 feet. 
On the Thames, at ats eg ; 1 
Head of Narragansett Bay, at Providence, 80 feet. 80 feet. 
To obtain the actual height above high-tide level, these num- 
bers should be reduced by whatever was the amount of depres- 
by 15 feet, if that was the true amount. 
Another reduction also is required. 
