100 THE GLACIER EPOCH OF AUSTRALASIA. 
deserve special attention. First, as regards the height up to 
which the marks of glaciation are found, Mr. Moore informs 
us that the surface of the conglomerates, within 25 feet of 
the summit of Mount Tyndall, is polished and striated, that 
is, at an altitude of 3,850 feet. Itis evident here that the 
collecting ground for the snow to generate glaciers in the 
small fremaining peak of 25 feet would not of itself 
adequately account for these higher polished surfaces, nor for 
the supply of glaciers on all sides which shed such extensive 
moraines as those lying all around Lakes Rolleston, Garnet, 
Dora, Dunn’s Boss; and, similarly, the small portion 
of Mount Sedgwick remaining above the original 
névé would not, of itself, adequately account for 
its higher glacial markings, nor for the extensive moraines 
around Lake Margaret, Hamilton Moraine (enclosed by 
a circular belt, Basin Lake), Lake Spicer, etc. The general 
trend of strize may as readily on Jower levels have the arrow 
head of lineal direction turned the other way. Is it not 
conceivable that the great elevated catchment basin of the 
great plateau, a little further east, may have sent down, by 
the existing deep channels of the North and South Eldon, its 
far mightier glacier streams, which, obstructed partially by 
the slightly elevated plateau of Lake Spicer and Lake Dora, 
might, nevertheless, ride over them, abrading and scooping 
out the basins of the present lakes and lJakelets in the line of 
their path, until they were finally stopped by impact and 
convergence with whatever local glaciers flowed from the 
crests of Mount Sedgwick and Mount Tyndall, and there- 
after their united streams, producing the large accumulation 
of moraine stuff on the 2,182 to 2,400 feet plateau at their 
bases, and at their arrested or final melting points? These 
remarks, however, are merely suggestive, and are mainly 
occasioned by the difficulty of adequately accounting for the 
moraine stuff and the extent of the glaciers, when so small 
a collecting ground remains above the ancient névé or snow 
line on the caps of Mounts Tyndalland Sedgwick. At any rate, 
Mr. Moore has supplied us with most valuable evidence which 
help towards the solution of these and cther difficulties, and 
his topographical charts of the leading features of this inter- 
esting neighbourhood are simply invaluable to anyone who 
wishes to study them. The prevalence of moraines at the 
2,000 feet level, both here and Mount Pelion and Lake Dixon, 
indicatin g gen erally the retiring points of the principal glaciers, 
are very significant, and strongly support my former views as 
to the absence of evidence of glaciation in the lowest levels, 
and also as to the probability that none of our Tasmanian 
glaciers ever reached the sea. 
The able paper by Mr. A. Montgomery, M.A., Govern- 
