GLACIAL STUDIES IN GREENLAND. 835 
the moraine and this remark may not apply to the western por- 
tion where the moraine seemed, from a distance, more deployed 
and complex. In the portion examined, the glaciers still press 
against the base of the moraine, but not forcibly. There is a 
slight valley between the moraine and the ice on either side, 
though this is not of such depth or steepness as to offer any 
serious difficulty in passing from glacier to moraine, or moraine 
to glacier on either hand. The moraine rises but little above the 
ice on either side, as will be seen by reference to Fig. 54, which 
is a view of the east end at the point where the glaciers are 
separated by the Sentinel nunatak. 
The surface of the ice adjacent to the moraine is almost 
wholly free from débris. That which is contributed to the for- 
mation of the moraine is borne by the basal layers of the ice on 
either hand. In the vicinity of the moraine the layers of the ice 
are curved upwards. This upward curvature of the strata is not, 
however, confined to the edge of the icein contact with the 
moraine, nor indeed to the immediate border of the glacier. In 
crossing the wide expanse of the foot of the Krakokta glacier, it 
was observed that the blue layers—-which best indicate the 
stratification of the ice where débris is absent—were continually 
coming to the surface by an upward curvature which increased 
as the surface was approached. This gave a beautiful structural 
expression to the surface of the ice, the layers being delineated 
in long, graceful, curving lines, concentric with the border 
of the glacier. It seemed very manifest that, at least in this 
glacier, the blue and white bands, which appear as stratification 
in the vertical faces, assume the form of highly inclined folia on 
the glacier’s surface, closely analogous, if not identical, with 
d 
the much discussed ‘‘ribbon structure” of Alpine glaciers. 
The eastern border of the foot of Krakokta glacier, between 
the point of junction with the Tuktoo glacier and the ice cascade 
previously mentioned, is unusually interesting from the varied 
relationships which it sustains to the terminal deposits. For 
some distance southeast from the point of contact with the 
Tuktoo glacier it lies opposite the Sentinel nunatak. For the 
rest of the distance around to the cascade it lies opposite the 
