David Milne-Home on Ancient Glaciers. 47 
usual limits, its sides would press against these debris and 
raise them into the form of an embankment similar to what 
now presented. 
ECU 
= roe 
RN 
Ancient Lateral 
_Moraines. 
nT 
\ a 
The two lateral moraines in question would_of course repre- 
sent two periods when the glacier had swelled laterally beyond 
usual limits. 
4. Proceeded to near foot of glacier on east side, where a 
face of hard rock, almost perpendicular, and quite smooth, for 
about 80 feet in height and 60 or 70 in length. The ice 
of glacier is seen pressing against lower part of this rocky 
face. Walked on the ice where it was in contact with rock, 
and also looked under glacier at several places where it was 
resting on the rocks forming the bottom of valley. 
Multitudes of hard blocks of stone between the ice and 
rocks, both at side and at bottom; had no doubt that the 
smoothing of the perpendicular wall, though about 80 feet 
of it now exempt from glacier action, produced by glacier 
rubbing and pressing on rocks as it flowed northwards. 
Noticed several natural joints or cutters in this rocky face, 
alongwhich, as usual in such cases, portions of rock broken off, 
and which had originally formed little projections. In most 
instances these projections had been all smoothed down, so as 
to bring both sides of joint to one uniform surface. In some 
cases the projections remained, but only where these looked 
northwards, and had thus escaped the grinding action of the 
glacier. : 
