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, Korlortoaluk. About three-eighths 

 of a mile from the waterfall at the measured altitude of sixteen hundred 

 and twenty feet, there occui's a shallow col drained south ward 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 covei'ed 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 w T ere 

 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 woi-king 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 



