190 
ALASKA GLACIERS 
exhibit a dominant trend and all slopes are fully adjusted 
in harmony with the drainage. 
The southeastern part of the Siberian peninsula is char¬ 
acterized by low mountains with spurs projecting seaward 
as promontories and alternating with fiord-like bays. The 
topographic details near the coast fall into three categories: 
(1) A system of relatively gentle slopes chiefly occupying 
uplands; (2) a system of relatively steep slopes chiefly 
exhibited in the walls of the fiords (at points of junction 
these are sharply contrasted with the slopes of the first 
system); (3) coastal features, especially shore cliffs and 
FIG. 92. EAST WALL OF PLOVER BAY, SIBERIA. 
The sky-line follows the boundary between the steep fiord wall and the smooth topography 
of the upland. A spit projecting from the end of the wave-wrought shore cliff protects the 
more distant part of the wall. 
spits, the product of wave action under present conditions. 
The smoother and older topography is not altogether de¬ 
void of steep slopes, but gives an impression of close ad¬ 
justment between processes of subaerial erosion and the 
unequal resistances of rock masses. I saw nothing in its 
profiles and contours to indicate glaciation. The newer 
and steeper slopes are associated with the troughs con¬ 
taining the bays in such way as to suggest glacial action, 
but those that we passed near betrayed no smoothing, 
grooving, or other minor feature of glacial abrasion. The 
shore walls of Plover Bay are precipitous rock cliffs at top 
and consist of talus at base, one phase passing into the 
other in a manner suggesting that the original rock pro¬ 
file was somewhat similar to the one brought about by 
