62 LAMI'LUGIJ : GLACIATION IN VANCOUVER ISLAND. 
a gutter of this kind has been excavated in an approximately north 
and south direction, the west wall is very steep, sometimes vertical 
or even undercut, whilst the east side shows a more g-radual slope, 
(see Figures). From this I at first inferred that the ice had moved 
CliffTop 
- ZZZlZHl BEACH 
Fig. 8. — Section of Cliff about a quarter-of-a-mile east of above, showing diviiion 
of drift deposits. Scale, 1 inch to 30 feet. 
A.A. — Division, not very distinct, but yet clear enough to show contortion. 
down into the channel from the east side, and borne heavily 
against the opposite slope by which it had been brought up 
and deflected, but the evidence of the stri^ on the surrounding 
horizontal surfaces did not bear out this view, (see Fig. 6). Of 
course, it is possible that the bottoms of these gutters may bear the 
marks of an earlier glaciation. This view was strengthened by the 
Avay in which the two sets of striae came in contact on the edges 
of these steep walls, where, instead of there being traces of a 
swerving of the horizontal set into the vertical, or vice versa, there 
i.s often a clear sharp angle, as shown in the sections in Figs. 6 and 7, 
and on PI. VIII., as though the upper set had been eating into an 
already glaciated surface. But in other places there was evidence 
which tended to show that striation in varying directions did 
sometimes take place contemporaneously. The finest example of 
this was in the beautifully glaciated boss of which I give a sketch 
on PL IX., where a horizontal joint-plane in the rock has apparently 
deflected the erosive agent along its course in such a way as to 
cause a deep shelf or recess to be scooped out, which, in rounding 
the north-western shoulder of the boss, swerves considerably from 
the direction of the strias on the surrounding surface, but which 
