428 STEPHEN R. CAPPS 
been given because of the dirty, moraine-covered character of the 
terminus. 
The lower 16 miles of the glacier, which have been mapped 
show an average width of nearly 3 miles. In this section the 
the glacier makes a great bend, and the direction of movement in 
the principal headward tributary is from north to south. 
Glacio-fluvial deposits: None of the large glaciers of the Toki- 
chitna basin have left conspicuous terminal moraines, and this is a 
result of the topographic position of the glacier ends, situated as 
they are in confined valleys where the glacial waters are given 
abundant opportunity to remove the glacial débris as it is dropped 
by the ice. There are, however, extensive deposits of stream-laid 
glacial outwash, for although the streams are of large volume they 
are overloaded, and the aggradation of the valley floor is rapid. 
Tokichitna River resembles the other glacial streams already 
described in the development of its aggrading flat, and in the way 
in which it splits up into many branching channels. 
Main Chulitna Valley.—Chulitna River is known to receive 
drainage from several small and one large glacier from the north- 
west, above the Tokichitna. The large ice stream, named Fideéle 
Glacier by Cook,’ who has published the only description of it, is 
described by him in the following terms: 
The glacier starts from the northeast ridge of Mount McKinley and flows 
almost due east for fifteen miles, where it receives a large arm from the north. 
Five miles southeast of this another arm swells the bulk of the great icy stream, 
and then it takes a circular course, swinging toward the Chulitna. Its face 
is about seven miles wide, its length is about forty miles, and the lower ten 
miles are so thoroughly weighted down by broken stone... . that no ice 
is visible. 
Northwest of this glacier there is a stretch of nearly 70 miles of 
mountains which are almost all unsurveyed, and about the glacia- 
tion of which little is known. 
HEAD OF SUSITNA RIVER 
The headwaters of the main fork of Susitna River, and its 
tributary the Maclaren, were surveyed in 1910. In the high 
mountains of this area the glaciers are closely spaced and fill the 
tF, A. Cook, op. cit., pp. 90-91. 
