UNALASKA ISLAND 1 85 
since risen, than to the hypothesis that the land was then 
high and has since subsided. 
UNALASKA ISLAND 
On two occasions we spent a few hours at Dutch Har¬ 
bor, making short excursions in the immediate neighbor¬ 
hood, and we also sailed along the north coast on a foggy 
day. The opportunities for observation thus afforded 
were much more limited than those enjoyed by Russell, 1 
and my notes are chiefly of service as affording verifica¬ 
tion of his description. The north coast, west of Cape 
Cheerful, is faced by a high sea cliff which testifies to 
rapid aggression by waves. The cliff shows in cross- 
section a number of U-shaped valleys, and these, so far as 
the fog permitted us to see them, have the simple contours 
characteristic of complete adjustment to the conditions of 
ice flow. Several of them end hundreds of feet above the 
sea, this condition being manifestly due to truncation by 
the receding shore cliff. One of them reaches the shore 
at tide-level, and the walls of that one seemed to be 
sheathed with a layer of drift in which post-glacial rills 
and brooklets have cut narrow gashes. The shore cliff 
also truncates, at rather high levels, a few V-shaped 
gorges, and the association of these with the glacial troughs 
gave the impression that the Pleistocene glaciers were of 
alpine type and not confluent. As the mountains were 
concealed by fog, I was unable to observe the cirques of 
which Russell makes mention. 
The forms of the hills about Unalaska Bay are not typi¬ 
cally glacial, but, on the other hand, they are not con¬ 
structional (with a single exception), and if products of 
atmospheric waste, they are of unusual type. The single 
constructional form is a young volcanic cone near Cape 
Cheerful. The other hills are also of volcanic rock, but 
1 Bull. Geol. Soc. Amer., vol. 1, pp. 138-140, 1890. 
