GLACIATION OF THE ALASKA RANGE 435 
KANTISHNA AND KUSKOKWIM DRAINAGE 
The glaciers on the northwest slope of the range, in its highest 
part, drain either by Kantishna River to the Tanana or into the 
Kuskokwim. Only a narrow belt along the base of the mountains 
has been surveyed and information concerning the glaciers is 
meager. Of them Brooks’ says: 
All the largest northward-flowing glaciers of the Alaska Range rise on the 
slopes of Mount McKinley and Mount Foraker. Of these the largest are the 
Herron, having its source in the neve fields of Mount Foraker; the Peters, 
which encircles the northwest end of Mount McKinley, and the Muldrow, 
whose front is about 15 miles northeast of Mount McKinley, and whose source 
Fic. to.—Glacier at the head of East Fork of Little Delta River. The high peak 
in the center is Cathedral Mountain. Photograph by J. W. Bagley, toro. 
is in the unsurveyed heart of the range. The fronts of all these glaciers for a 
distance of one-fourth to one-half a mile are deeply buried in rock débris. 
Along the crest line there are numerous smaller glaciers, including many of 
the hanging type. Both slopes of Mount McKinley and Mount Foraker are 
AGENCOVELECs =n ae The glaciers that came under the observation of the writer 
all appeared to be receding rapidly. There is, however, little proof of the rate 
of recession. Spruce trees about 6 inches in diameter were seen in the old path 
of the Muldrow Glacier about 5 miles from the present ice front. If the age 
of these trees is estimated at fifty years, this fact, so far as it goes, indicates an 
average annual recession of about one-tenth of a mile. 
QUATERNARY DEPOSITS IN THE TANANA AND KUSKOKWIM BASINS 
Since the higher mountains are still in the glacial period, and 
since moraines and outwash materials are now being, and have 
tA. H. Brooks, ‘‘The Mt. McKinley Region, Alaska,’ Prof. Paper U.S. Geol. 
Survey No. 70, 1911, pp. 125-26. 
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