90 J. D. Dana—The Flood of the Connecticut River Valley 
but there is a remarkable uniformity of characters in the cla 
beds, especially the higher, which seems to indicate that they 
in general the same glacial source. 
4. Deposition. Terraces.—As happens now, deposition should 
have taken place over the flood-grounds, either side of the 
channel, wherever the waters were more or less retarded, and 
over the bottom according as the velocity there allowed of it. 
Through these depositions, the terrace-formation and its ter- 
races were made. Along the side of the swiift-flowing stream, 
But meteorological phenomena have their long cycles; and 
these would have made the progress of the flood intermittent, 
at of maximum flood, one at 60 to 80 feet above modern low 
water and another 40 to 60 feet below the maximum. 
According to the process described the terrace-plains were 
