2Li,l)' Ghicier Rf'(jioii^ Ahtshi. — -ChsJi!h</. 22l> 
angles to the movement of the ice. On the contrary had the 
glacier been vigorously eroding the mountain side its tendency 
would have been to obliterate the gully by grinding down the 
sides to an equality with it. That the gully was filled with ice 
moving along it and at right angles to the motion of the main 
mass is shown by the perfectly preserved striae in the gully having 
that direction, while the strist on the mountain sides close at hand 
have the direction of the main movement. Granting the erosive 
power of glacial ice, the slow moving tongue of ice in the gully 
could have had little erosive power compared with the great mass 
sweeping over it along the side. Hence the erosion should have 
caused its disappearance. That the glacier has done little more 
than to remove the loosened rock and polish the resulting surface 
is shown in a vast number of localities here by the character of 
that surface. AVhere the ice has been forced through a narrow 
gap the sides of that gap are planed to a prett}' smooth surface. 
Where it has run against an obstruction in its path it has 
pretty thoroughly polished the stoss side. Otherwise the surface 
presented is a somewhat jagged one with the rough edges pol- 
ished but not much planed down, showing that after the loose, 
fissured material was removed, leaving a somewhat pitted surface, 
the ice was even unable to ol)literate the traces of the cavities 
from which the last Ijlocks were removed. This naturally is more 
especially true of the harder eruptives than of the softer rocks, 
and such surfaces are well shown on (\ and H. 
Sediment brought down hi/ sfmims. — Estimates of the amount 
of material brought down l)y the glacier are difficult to obtain 
owing to the fact that the material is all carried into the sea. that 
the number of sul)-glacial streams is not known, and that there is 
no evidence that those whicli issue from the ice directly into the 
water carry as much sediment as those which issue from the cor- 
ners and flow through the gravels. T could find no evidence incon- 
sistent with the supposition that the debris falling on the surface 
of the ice yearly, together with the previously disintegrated 
material which the ice has removed and is removing is ami)]y 
sufficient to account for all the detritus deposited at the front of 
the glacier. The amount of mat<'rial in sight on the siirface of 
the glacier is enormous. 
JRock haslns. The maiuier of occurrence of the small rock 
basins found in the district has alrendv l>ecn nivcu. tou'i'tlier with 
