FLEISTOCEXE GEOLOGY OF MOOERS QUADRANGLE 



35 



and that the waves set up by bergs forming along the ice front 

 were the cause of the phenomena. With the surface of static 

 water as high as the 640 foot contour line at this locality, there 

 would have been a depth of water of 140 feet at a distance of 1 

 mile, of 240 feet at a distance of 2 miles, 340 feet at 3 miles, depths 

 far less than those in Greenland fiords, but not as I conceive it, 

 incompatible with the idea of berg-made waves of a magnitude 

 greater than wind-made waves in an open body of water in the 

 same position. 



Against the view of berg-made waves, it is to be noted that 

 Cobblestone hill stands out in a more exposed position than the 

 similar ridges immediately north and south of it; and that the 

 benches of cobblestones on its wave-washed face range through 

 over 30 feet of elevation, as if the cause persisted through a change 

 of water level. 



The highest beaches detected south of Cobblestone hill appear 

 to be along the same water level, falling off gradually in elevation 

 as the shore line is traced southward. The elongate hill which 

 rises to the 700 foot: contour line between the Little Chazy river 

 and the north branch of Ferrel brook is decidedly ribbed on its 

 eastern face at about 670 feet. In the flat at the eastern base of 

 the hill, in the woods, at 630 feet (aneroid) there is a stony belt 

 suggesting brief wave action. 



Still farther south, between the branches of Ferrel brook from 

 about 670 feet down to 625 feet (by contours of the map) there 

 are four wave marks, the uppermost of which is traceable for 

 about | of a mile. 



Between the southern branch of Ferrel brook and the northern- 

 most branch of Silver creek, faint wave marks are distinguishable 

 from 650 feet down to 590 feet. 



Southward of these indications to the southern limit of the map 

 (44°45'n.lat.) the steep slope of the base of Rand hill, between 600 

 feet and 630 feet at least, is smoothened with rubble which 

 appears to have been deposited under water or under the action 

 of light waves as the water surface passed from higher to lower 

 levels of the hillside. 



At the extreme southern limit of the sheet and south of the road 

 to Dannemora, a strong ridge appears delimited on the atlas 



