276 
the bores of the Georgina basin still remained unknown, and the 
solution of this problem would throw a great deal of light upon 
the physical geology of North-western Queensland. 
3. Toe AGE OF THE HALLETT’S CovE-GLACIER. 
The recent discovery that the glacier-path at Hallett’s Cove 
passes beneath the escarpment of the marine Miocene erases an 
important coordinate factor in the production of the climatic 
conditions which prevailed during the Diprotodon-period. We 
cannot shift back the age of the Diprotodon, because the sedi- 
ments which entomb the marsupial and its associates are cer- 
tainly post-Miocene. The absence of glacial conditions does not, 
however, invalidate the argument of high piuvial conditions in 
Pliocene times, which is based on independent physical evidences. 
The fact that the glacier-path at Hallett’s Cove is pre-Miocene 
should not force us to accept contemporaneity with the glacier- 
phenomena at Bacchus Marsh, admittedly of Permo-carboniferous 
age, which there seems a too-hasty disposition to concede ; whilst 
the more or less incoherent “ ¢i//” at Hallett’s Cove is not com- 
parable with the highly indurated glacial sediments at Bacchus 
Marslf; and, moreover, other interglacial periods are indicated in 
the stratified rocks of New South Wales and New Zealand. 
Moreover, the pronounced differences between Eocene and 
Miocene may lend some argument to uphold the view of a post- 
Eocene or intra-Miocene age of the Hallett’s Cove glacier. The 
late Mr. G. Scoular (Trans. Roy. Soc., S. Aust. vol. VIIL., pp. 
36-48, 1886) thought that the more tropical aspect of the Eocene 
was gradually driven northward by an increase of cold, which 
finally eventuated in the depopulation of the marine area at the 
close of the Miocene period. In a certain sense the Eocene fauna 
is tropical, and it is certainly true that the Miocene fauna has a 
distinct modern facies, and, relatively to that of the same area 
before and after, is a much depauperated one. These circum- 
stances may have been produced by a glacier-climate intervening 
between Eocene and Miocene, and continued into the latter. 
However, the problem must await solution until the discovery of 
organic remains in the stratified parts of the “ till,” which will 
determine also the condition of its deposition. 
4, Jurassic Rocks In NEw SoutH WALES. 
A small patch of shales on the Talbragar River, at about 16 
miles NN.E. from Gulgong, was discovered to be plant- and fish- 
bearing, and was reported on by Geological Surveyor Anderson 
in 1889. By him these fossiliferous beds were regarded as form- 
ing “an isolated lenticular patch in the horizontally-bedded 
