118 RESEARCH. COMMITTEES. 
of clay and stones resting on the polished rock agree very well 
with the local drift, whilst the face of rock discovered by the 
present writers was overlain by a bank of loose river silt. It is 
quite possible that the bank of glacial drift has been washed away 
and its place taken by more recent deposits, or otherwise the river 
silt may have been washed up against the face of drift and thus 
obscured it. No other examples of polished rock surfaces were 
observed by us within the limits of the Inman Valley. 
Close to this interesting spot, on the northern side of the 
stream, there is a ridge about 100 feet high which is chiefly of 
glacial origin. Large and very numerous erratics up to 12 ft. by 
13 ft. by at least 3 ft., cover the sides of the hill, the larger 
number being granite. In places the huge blocks of granite are 
so closely heaped together that at first sight they were thought 
to form a natural outcrop. A careful examination, however, 
proved that this was not the case. Many of the large stones 
were polished and faceted. These have evidently been weathered 
out of an extensive bed of glacial drift which originally sub- 
merged the hill. Interesting sections of the drift are exposed in 
some of the lines of erosion cut in the hill sides by the mountain 
torrents. At this place it is an indurated sandstone thickly 
studded with erratics of all sizes and has a dip of 10° W.N.W. 
At 94 miles from Port Victor an excellent section of the Drift 
is seen in the bed of the stream, having a dip of 7° E.8.E., con- 
taining numerous boulders of large size. One example of Port 
Victor granite, which had been washed clear of the matrix, 
measured 7 ft. by 6 ft., whilst others, almost equally as large, 
were exposed im situ only partially separated from the drift in 
which they were originally buried. 
A quarter of a mile higher up the stream a good section of 
drift is seen on the north bank, consisting of two very distinct 
beds. The upper is a friable sand-rock carrying large boulders. 
This bed has probably, to some extent, been rearranged, as it is a 
softer stone than is usual with the drift of the locality, but the 
included stones are mostly heavily striated and give no evidence 
of river action. Subsequent to glaciation it is not unlikely that 
the upper drift at this point has slid or been washed down from 
the high ground on the northern banks. This boulder bed rests 
on a dark mudstone containing few stones. The undisturbed 
drift beds at this point gave the same dip as was found a little 
lower down the stream, viz., 7° E.S.E., and showed a face 30 feet 
in thickness. 
About 150 yards higher up the valley the drift again shows 
strongly in the bed of the stream as a white indurated sandstone 
with irregular bands of conglomerate. Dip 8. 35° E. at 18°. 
Here for some distance the bed of the river is almost choked 
with an immense number of large boulders ; some of these, where 
