THE GEOGRAPHIC SOCIETY'S ALASKAN EXPEDITION 35 



Scale: 



VARIEGATED AND HAENKE GLACIERS 



Which were stagnant and easy to cross in 1905, crevassed and impassable in 1906, and 

 stagnant and passable in 1909. Hubbard glacier, perhaps, began an advance in 1909 (see pages 

 16, 17, 19 and 22). 



noticed far to one side of the area of 

 vigorous shaking. Just what is to be ex- 

 pected near the periphery of the area of 

 maximum shaking we are not in a posi- 

 tion to predict, though it is to be expected 

 that there, also, some response, probably 

 less spectacular, should occur. In a single 

 field season we could not, of course, cover 

 an extensive area in personal field work, 

 but we were able to do some work in the 

 Prince William Sound region and in the 

 Copper River Valley, and we made some 

 observations on glaciers visible from the 

 steamer and made inquiries regarding 

 them. 



So far as we could learn from our in- 

 quiries none of the glaciers of the Inside 

 Passage have undergone any notable 

 transformation since 1899, excepting that 

 of recession as exeniDlified especially in 

 the Muir glacier. The Brady glacier, 

 near which our ship anchored for the 

 night, has not changed notably since T905. 

 when we last saw it, and we could not 



detect any changes in the great glaciers 

 which descend the western face of the 

 Fairweather Range, although it should be 

 stated that most of these were seen from 

 such a distance that we could have de- 

 tected only extensive changes. These 

 glaciers, together with the Bradv, Muir, 

 and others in this vicnity, are withm the 

 area shaken during the September, 1899, 

 earthquakes and may be expected to re- 

 spond, to some extent at least, to the 

 effects of this shaking. 



The natives residing at Dry Bay, 60 

 miles southeast of Yakutat Bay, report 

 that in the summer of 1909 there were re- 

 markable and long-continued changes in 

 the volume of the Alsek River, which 

 may be related to the advancing and 

 breaking of some of the glaciers whose 

 ends lie up this valley. W'e may expect 

 advance in these glaciers, for their 

 sources lie in the snow fields of moun- 

 tains within the area of vigorous shaking 

 during the 1899 earthquakes. 



