ON THE GEOLOGY OF WEST MORETON, QUEENSLAND. 137 



NOTES on the GEOLOGY of WEST MOLtETON, 

 QUEENSLAND. 



By R. A. Wearne, b.a., and W. G. Woolnough, d.sc, f.g.s. 



[Read before the Royal Society of N. 8. Wales, August 2, 19ll.~\ 



I. Introduction.— The area designated in this paper as 

 the West Moreton District extends from the Brisbane River 

 on the north, to the McPherson Range on the south, and 

 from the Logan River on the east to the Main Dividing 

 Range on the west. 



Dr. H. I. Jensen, in his paper on the Alkaline Rocks of 

 Southern Queensland, at the Brisbane Meeting of the 

 Australasian Association for the Advancement of Science, 

 referred to the Main Dividing Range as the Little Liver- 

 pool Range. In the following remarks the title Little 

 Liverpool Range is applied to the spur of the Main Range 

 that runs from Mount Oastle northwards, and is crossed 

 by the Brisbane-Toowoomba Railway Line between Grand- 

 chester and Laidley. 



II. Work of Previous Observers.— The northern border 

 of the area under discussion has formed the subject of a 

 monograph by Cameron. 1 In this report the general 

 sequence of the Ipswich Coal Measures is worked out, but 

 no description is given of the volcanic series which forms 

 the subject of the present paper. 



Jensen 2 has studied the volcanic series. He describes a 

 number of rock types, particularly from Mounts Flinders 



1 Cameron, W. E. — Geology of the West Moreton or Ipswich Coalfield. 

 Geol. Survey of Queensland, Rep. 1899. 



8 Jensen, H. I. — Notes on the geology of the Mount Flinders and 

 Fassifern Districts, Queensland, Proc Linn. Soc. N.S.W., Vol. xxxiv, 

 1909, pp. 67-104; also The Alkaline Rocks of Southern Queensland, 

 Rep. Aust. Assoc. Adv. Science, Brisbane, 1909, pp. 249 - 258. 



