BY R. M. JOHNSTON, F.LS. 99 
supposition.” He then proceeds to state: ‘On the sides of 
the gorge there are many small boulders. In one I found 
a quantity of carbonate of copper. I had not sufficient time 
to search for striated markings on the rocks, but my impres- 
sion was confirmed in later years by the account of Mr. W. R. 
Bell, who described the position of the moraine of this ancient 
glacier. The same indications are to be found in the King 
River and the Franklin River.” 
It is evident, therefore, that the recent account of all the 
characteristic phenomena of glaciation observed in 1892 and 
1893 by Messrs. Dunn and T. B. Moore* in the same region, 
that is in the neighbonrhood of Mounts Tyndall, Sedgwick, 
and Murchison, and charted so clearly on Mr. T. B. Moore’s 
accompanying maps, confirm Messrs. Gould, Sprent, and Bell’s 
earlier observations 5 and although the later observers, Dunn 
and Moore, write as if they were unacquainted with the much 
earlier observations of the persons named, as well as of the 
descriptions to be found in my work on the Gealogy of Tas- 
mania, it does not detract in the smallest degree from the 
valuable additions which they have made to our knowledge of 
the evidence of former glacial action in the alpine regions of 
Western Tasmania. 
The occurrence of what appears to be the older con- 
glomerates, so closely associated with newer drifts, and also 
bearing ice marks, according to Dunn and Moore, and which 
may possibly be local representations of the debris of floating 
or partly stranded ice sheets, so abundantly manifested in 
rocks of Permo-Carboniferous age, in South-Eastern Tasmania, 
and also in similar rocks in Victoria (Bacchus Marsh), and 
New South Wales, suggest doubt as to whether some of the 
Moraine stuff, found on the flanks of western mountains, upon 
whose crests this older conglomerate rests, may not be con- 
founded at times with the true moraine stuff of the more recent 
glacier epoch ; for it is possible that recent disintegrations of 
the older ice-marked conglomerate, gravitating over the steep 
slopes, may also be largely represented, and sometimes mixed. 
up with the more recent moraines. It is barely conceivable, 
however, that the older conglomerate would still preserve the 
finer marks of scratches, striz, or groovings; but if the less 
perishable rocks were, until recently, preserved undisturbed 
in some peculiarly favourable matrix, it is conceivable that 
some traces of original markings might still remain unob- 
literated. 
_ There is one or two facts of very great importance dis- 
closed by Mr. T. B. Moore’s charts and observations which 
* “Discovery of Glaciation in the vicinity of Mount Tyndall, Tasmania.” By T. 
B. Moore. (Roy. Soc., Tas., 1893). 
