GLACIAL STUDIES IN GREENLAND. 677 
thin line of earthy and rocky material. The corrugations were 
not unlike those of the zinc facing of a washboard, except that 
they were on a much larger scale. I not only found that the 
débris layer was corrugated, but that for some inches below there 
were blue laminations of clean ice that were corrugated harmoni- 
ously with it. I succeeded in following these backward into the 
ice sufficiently to show that they were not simply superficial. 
Presumably they extended some distance along the junction 
plane. This phenomenon, it will be observed, is not precisely 
Fic. 49.—Diagram illustrating the phenomena of faulting and drag as seen on 
the south side of the South Point glacier. 
that suggested above, but it has a bearing upon the interpreta- 
tion of the fluted under surfaces of overjutting layers that were 
observed in very pronounced development in some of the glaciers 
yet to be described. 
An observation was made on the: south side of the glacier 
that bears upon the same question. On each side of a fracture 
plane extending obliquely across the ice layers, the laminations 
were bent toward the plane just as they are in the phenomena 
of faulting and drag (Fig. 49). There seemed no ground for 
doubt that there had been motion along the plane of fracture 
and that the ends of the laminations next to it had been bent 
backwards by the friction of the two faces. Similar phenomena 
were observed in several other places. 
At another point upon the south side of the glacier there 
was a wide band of débris-set ice that zigzagged in a very 
irregular way from the summit of the ice cliff to its base. Fig. 
50 is a representation of a sketch made upon the ground. The 
point at which this appeared was near the extremity of one of 
the medial moraines, and it seemed probable that this dark zig- 
zag tract represented the junction of the two parts of the gla- 
cier that had united on the lower side of one of the nunataks 
