74 
president’s ADDRESS — SECTION C. 
the conglomerate rock, probably Devonian, are powerfully striated 
and well polished to within 20 feet of the summit of the mountain, 
the elevation of which is 3,850 feet. Morainic material was observed 
by him at the above locality down to a level of between 2,182 and 
2,400 feet above the sea. 
Mount Sedgwick is stated to have been glaciated to within a short 
distance of its summit, the altitude of which is 4,000 feet. 
The chief direction along which the ice has moved has been from 
jS t .E. to S.W.* 
Mr. T. B. Moore states {op. cit p. 148) — “ At an elevation of 3,500 
feet above sea-level, adjoining the greenstone on the south-east side of the 
Mount— [Tyndall— T.W.E.D.]— I was pleased to discover a bed of 
glacial conglomerate containing coal-measure fossils'. The pebbles are 
scored in all directions, and many beautifully polished. The conglome- 
rate is composed of rocks quite foreign to the country — granites, slates, 
porphyry, Ac. — and as they occur at such a high elevation, embedded 
together, intermixed with Carboniferous fossils, and the pebbles scored 
before the mass was consolidated, there is not the slightest doubt that 
the conglomerate has been formed from the debris deposited by float- 
ing ice when the land was under water. This also points to the fact 
that the deposit was laid down at a previous period to the epoch of 
the land glaciation.” He states (op. cit ., p. 148) that the moraines 
to the wept of Lake Margaret are the most extensive observed by him, 
and rise from 200 to 300 feet above the lower valleys. 
In 1S93, Mr. A. Montgomery, the Government Geologist, con- 
siderably extended our knowledge of the glaciation of Tasmania in 
Pliocene or Post-Pliocene time by a very interesting description of 
evidences of ice-action at the head of the Elver Forth, at Barn Bluff, 
and at Mount Pelion.f 
The evidence is described as consisting of moraine stuff, and 
singularly perfect roclies moutonnees and erratics at the 2,000 feet to 
the 2,792 feet level near Lake Eyre (in Tasmania). 
Mr. Montgomery {op. cit., p. 161) questions the accuracy of Mr. 
T. B. Moore’s opinion as to the glacial conglomerate at Mount 
Tyndall being of Permo-Carboniferous Age, and suggests that it 
may be a redistributed Permo-Carboniferous conglomerate, glaciated 
perhaps, in Tertiary times. He states that near East Mount Pelion 
roclies moutonnees are very well developed, and that erratics and 
striated rock surfaces are frequent, the movement of the ice having 
been from north to south ; that the greenstone erratics are very little 
decomposed, and that the ice-worn rock surfaces are in a splendid 
slate of preservation — arguments in favour of a Pleistocene rather 
than a Pliocene Age for the glaciation, as also is the good state of 
preservation of fragments of Permo-Carboniferous cannei coal in the 
moraines {op. cit., p. 163). 
In 1893, Messrs. Graham Officer and L. Balfour published a 
paper on the Bacchus Marsh Conglomerates. J This paper is well 
illustrated by photographic plates. They were led to believe that 
there was evidence at Bacchus Marsh of glaciations belonging to two 
* “Discovery of glaciation in the vicinity of Mount Tyndall, Tasmania,” by T. B. 
Moore. Papers and Proc. Roy. Soc. Tasmania, 1893, pp. 147-149. 
t Papers and Proc. Roy. Soc. Tasmania, 1893, p. 30. 
X Proc. Roy. Soc. Victoria, vol. v., new series, pp. 45-68, pis. x., xii., 1893. 
