128 
ALASKA GLACIERS 
77. In each case the point of view is so low that the up¬ 
land peaks do not unite in an even sky-line, but other 
plateau features are brought out. 
The correlation of the Cape Spencer peneplain with the 
Lynn Canal plateaus brings together very different topo¬ 
graphic types, but they are not essentially incongruous. 
The greater height of the inland district has caused it to 
be occupied by local glaciers, which have scooped out a 
system of cirques and rounded valleys, leaving the inter¬ 
vening crests angular. The cape district is and has been 
too low to initiate glaciers, but has been overflowed by 
FIG. 63. UPLAND TOPOGRAPHY NEAR WALKER BAY, BEHM CANAL. 
an ice-sheet originating outside it. It therefore lacks 
cirques and the sharp crests developed by cirque erosion, 
but has suffered a somewhat equable reduction of its flat- 
tish summits. 
In turning attention now to figure 63, we leave the 
region of Lynn Canal and pass three hundred miles south¬ 
ward to the Walker Bay region near Behm Canal. The 
general height of crests is here 4,000 feet. The even sky¬ 
line includes a few sharp peaks, suggesting the cirque 
sculpture of the northern area, but most of the distant 
summits and all of the nearer are rounded, as by an over- 
