PHYSIOGRAPHIC EVIDENCES OF RECENT UPLIFT 39 



or else in front of narrow pocket beaches; elsewhere they are doubtless 

 deeply buried beneath beach and delta deposits. 



NEW REEFS AND ISLANDS 



At a number of places in Yakutat bay and its extensions the depth of 

 the water has doubtless been very materially altered by the changes of 

 level, but unfortunately we have no soundings to demonstrate this. In 

 at least two places, however, new land was raised above the water away 

 from the coastline. One of these, indicated on the map (see plate 23), 

 lies north of Haenke island, forming a menace to navigation. There 

 are two long, narrow islets, the larger approximately 50 feet wide 

 by 250 feet long. Both are rounded, glaciated surfaces rising out of 

 what is otherwise apparently a deep fiord, judging from the freedom 

 with which large icebergs float in it. Formerly no rocks were seen here, 

 even awash at the lowest tides, according to our Indians. Now the reefs 

 are thoroughly uncovered at low tide and not quite concealed when the tide 

 is high. Small icebergs strand on them and are left when the tide goes 

 out, and stones from the melting of these bergs have already accumu- 

 lated on their surfaces. From the abundance and size of the stranded 

 rock fragments as well as from the seaweed growth on the reefs, it is 

 inferred that these islands were shoals in the bay before 1899, and that 

 icebergs went aground upon them even then., 



Near the head of Eleanor cove, southeast of Knight island, and almost 

 at the base of mount Tebenkof, where the mountain and foreland meet, 

 there are four small islands which, according to our Indians, were uplifted 

 during the earthquake (see plate 16, figure 2). Three are of rock, one 

 of gravel, doubtless on a rock core. The two smallest are 50 feet long, the 

 two largest each about 450 feet long and 75 feet wide in the broadest part. 

 Their long axes are parallel and approximately parallel to the mountain 

 front and to the fault which is inferred here (see fault line A, plate 23). 

 They are in fact almost exactly on this inferred fault line. Before 1899 

 two of these islands were above water at low tide, but none rose above high 

 tide. Now two are visible at all tides, and the other two only between 

 mid and low tide. Thus two new reefs are now exposed, one of rock and 

 one of gravel, and two others, previously visible only at low tide, are lifted 

 above high tide. The highest of these reaches 3 feet above high tide, and 

 on its crest are found dead barnacles in place, thus furnishing testimony 

 of uplift independent of that supplied by the natives. 



The Indians pointed out to us a number of places, through which 



