20 
KENDALL : THE GLACIER LAKES OF CLEVELAND. 
fact that the overflow had cut down to a bed of hard grit out of 
which the sill came to be formed. 
By the recession of the ice and the cutting of these overflows, 
Lake Eskdale would be gradual^ lowered to tlie o25-foot con- 
tour, which is the level of the overflow at Fen Bogs (Plate 
VIII.). The w^atershed is here cut through by Xewton Dale 
as a broad, flat-floored trench, more than 50 feet deep, with 
steep sides, Tlie gorge is now carpeted with a considerable 
No. 2. — Section across EHerbeck. 250 yards below 
confluence with Fen Bogs 
Fig. 5. 
COMPARATIVE SERIES OF SECTIONS ACROSS THE VALLEY OF 
ELLER BECK AND NEWTON DALE. 
thickness of j)eat, but borings have shown that the rock floor 
is almost exactly 525 feet above sea-level. Newton Dale is 
a fine gorge with very steep sides rising to 300 feet or more, 
and exhibiting a series of windings which show that the valley 
walls were the banks of tlie stream as well. Just to the north 
