LAKES AND VALLEYS OF NUGSUAK PENINSULA 661 
that of an overturned fold, whose axis is at right angles to that 
of the valley. The position of the strata proved that at no 
point could the valley owe its origin to folding. Rock structure 
and position were also opposed to origin by differential weather- 
ing. The tracing of the same and equivalent strata on the two 
sides of the valley would preclude faulting. Damming by depo- 
sition of morainic material is untenable, since no moraines of 
any extent occupy any portion of the valley. 
The only other possibility to account for these lakes is that 
of ‘‘zce erosion.” A brief description of the lakes in this series, 
with the closely associated glacial phenomena, will best show the 
evidence for their glacial origin. 
The first lake is the only one of this series with bottom above 
sea level. It is located 60 feet below the valley divide and 165 
feet above the surface of the middle lake. It is more or less 
saucer-shaped in outline, and is, with the exception of the east 
side, entirely inclosed between highly polished and striated 
moutonnée forms. 
ithe middle lake, marked lake No; 2 0f Pig.:2, lies immie= 
diately against the high, precipitous south wall of the valley, 
and inclosed entirely by moutennée forms on its north, south, 
and west sides. It is entirely surrounded by rock in place with 
its bottom 39 feet below sea level. The moutonnée forms on 
the north side of the valley are highly polished and planed, with 
glacial grooves and striae greatly intensified, reaching from the 
lake’s surface up to an elevation of 100 feet. These are coinci- 
dent with the trend of the valley. 
The space between the middle lake and lake No. 3 of Fig. 
3, is occupied by moutonnée forms of well-rounded outline and 
slight elevation. Lake No. 2 drains into lake No. 3 through a 
rock channel some 50 yards across and about 100 yards long, 
carved between the close-lying moutonnée hills. 
The lake occupying the west end of the valley lies, for most 
of its length, immediately against the high, precipitous north 
side. It is something over a mile in length, very narrow, and 
quite irregular in outline, closely resembling a stream. It is 
