DALY: GEOLOGY OF THE NORTHEAST COAST OF LABRADOR. 249 
trast with those lower down. This contrast is such as to enforce the 
belief that glacier ice did not reach higher than about twenty-one hun- . 
dred feet above the present sealevel. 
Similar evidence was found on Mt. Elizabeth, and the limit of glacia- 
tion was put at the same level as on Mt. Ford. 
Although of no special importance in connection with the problem 
now under discussion, brief reference may be made to a curious novelty 
that was found in the search for the glacial limit on the twenty-five hun- 
dred-foot ridge east of the cascade, Korlortodluk. About three-eighths 
of a mile from the waterfall at the measured altitude of sixteen hundred 
and twenty feet, there occurs a shallow col drained southward into the 
Bay and northward into the main hanging valley. This col is floored 
over completely with glacial boulders packed closely together so as to 
form two smoothly graded slopes gently declining in the directions of 
the drainage-lines mentioned. The total-length of the doubly graded 
pavement is about two hundred and fifty yards. At either end it 
terminates in much steeper slopes of bed-rock. The width varies from 
thirty to fifty yards. The pavement is bounded laterally by glaciated 
ledges covered with erratics ; the latter are plainly in a much fresher 
condition than the materials of the general Felsenmeer. That the de- 
posit is not of the nature of a barrier-beach is clear from the subangular 
form of the boulders that show no sign of having been water-worn. 
There is, moreover, unequivocal proof that the land during postglacial 
time was not submerged more than about two hundred and fifty feet at 
Nachvak Bay. Similar doubly graded slopes of rock-fragments were 
discovered on Mt. Elizabeth at altitudes of twenty-two hundred and 
twenty-three hundred and fifty feet, but these seemed to be simply parts 
of the ordinary streaming Felsenmeer, as the rock-fragments were quite 
angular and deeply weathered. The two types may be analogous in 
origin, but it is difficult to imagine how an ice-sheet could veneer a col 
deeply and completely with typically ice-worn boulders. Without even 
a working hypothesis to go upon, the question of origin must here be 
left unanswered. 
But the most satisfactory locality yet studied occurs in the Kogarsuk 
Valley. About two and a half miles from the delta of the brook and on 
the eastern slope of Kaputyat Mountain there is a series of ten lateral 
moraines at elevations of from seven hundred and fifty to seventeen hun- 
dred feet above sealevel (Fig. 3). The deposits are composed of large, 
relatively fresh, subangular boulders with a small intermixture of clay. 
The form of each moraine is that of a steeply scarped bench or of a distinct 
