584 T. C. CHAM BERLIN 



borne out by the radiating glaciers of the Redcliff peninsula 

 can be supposed to have been carried more than six or 

 eight miles. Some of that borne out by the great inland sheet 

 may have been carried three or four hundred miles. 



If, in the descriptions and illustrations that follow, it shall 

 be found that the interlamination of debris in the base of the 

 great ice-cap is of the same nature and degree as that of the 

 small ice-caps we have just studied, it will seem to be a safe 

 inference that this intrusion of debris has narrow limitations in 

 its development and is not at all proportional to the magnitude 

 of the ice body with which it is connected. The point is one of 

 fundamental importance, for it has a decisive bearing on the 

 radical question whether the ratios of free to loaded ice which 

 are found to obtain in the small glaciers can be applied to the 

 great ones that are now extinct. If, for instance, it is found 

 that a glacier which is no more than six or eight miles in 

 length is well inset with debris to the height of fifty or sixty, 

 or even one hundred feet, from its base, it might be inferred — 

 indeed it has been inferred — that a glacier 300 or 400 miles in 

 length might be filled to a proportional height, i. e., to 2500 or 

 3000 or even 5000 feet. If such a law of ratios holds true, we 

 shall find the glacial lobes and border of the main ice-cap 

 exhibiting an interlamination and a burden of debris of a truly 

 magnificent order. 



The purpose of this discussion, at this point, is to quicken 

 observation on the illustrations of the great ice-cap, and of its 

 lobes and tongues, to which we now turn. 



The Tuktoo glacier. — The general form and relations of the 

 Tuktoo glacier may be best apprehended by reference to the 

 maps opposite pp. 198 and 669 in preceding articles. It will 

 there be seen that it is simply a lobe of the main ice-cap descend- 

 ino- from the north to the lowland which constitutes the neck 

 of the Redcliff peninsula. Its movement is directly opposite to^ 

 that of the Krakokta glacier last described, which descends the 

 north slope of the Redcliff plateau. These two glaciers come 

 into direct conflict and form the most interesting joint terminal 



