132 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
proximate analyses, which are graphically shown on the accompanying text 
figure together with those of the Alpha, and Carnarvon Creek torbanites for 
purposes of comparison. As recent palaeontological work (Beasley, 1945) has 
shown that The Narrows Tertiaries and the Petrie Series are both probably 
of Miocene age, it seems likely that these two Tertiary oil shales were formed 
at the same time, and they may be correlated with some confidence. 
Text-figure 2. — Ternary diagram graphically showing the chemical relationship between 
The Narrows, Stratlipine, Carnarvon Creek and Alpha samples studied. 
The two torbanites studied have shown themselves to be generally similar 
to the Permian torbanites of New South Wales, recently described and classified 
by Dulhunty (1939; 1943). The medium- to high- grade, dull melanocratic 
torbanite of the Alpha deposit appears to have precise affinities with the Glen 
Davis torbanite of New South Wales, while the low-grade, dull mielanocratic 
torbanite of the Carnarvon Creek deposit is the same type as that of Mort V, 
Lower Seam in the Megalong Valley, N.S.W. 
ACKNOWLEDGEMENTS. 
This work has been financed by the Commonwealth Government Grant 
through the Council for Scientific and Industrial Research to the University 
of Queensland. I would like to thank Dr. W. H. Bryan for his helpful criticism, 
and Professor H. C. Richards for his personal interest in enabling me to carry 
out this w^ork. I am indebted to Mr. II. G. Dunstan of the Government Chemical 
Laboratory for the chemical analyses. 
