32 T. W. E. DAVID. 



the Hartley Bowenfels District which shows the folds of 

 the Devonian rocks of that neighbourhood, and did much 

 to elaborate the geological map outlined by Mr. Olarke. 

 This has been added to under the direction of Mr.Wilkinson's 

 successor Mr. E. P. Pittman, Assoc, e. s. m., by himself and 

 the officers of his Geological Survey, notably Mr. J. E. 

 Oarne, f.g.s., and Mr. E. C. Andrews, b.a., while the maps 

 of the Southern Coalfield by Messrs. J. B. Jaquet, assoce.s.m., 

 and L. P. Harper, f.gls., and that of the Hunter River Coal- 

 field by Messrs. G. A. Stonier, W. S. Dun, O. Tricket and 

 myself have added information on tectonic movements of 

 the crust since Permo-Oarboniferous time. These obser- 

 vations have been supplemented by the valuable work of 

 Dr. H. I. Jensen, d.sc, on the alkaline rocks of the Canobolas, 

 Warrumbungle and Nandewar Ranges. 1 Messrs. 0. A. 

 Siissmilch, E. 0. Andrews, and 0. Hedley, have lately con- 

 tributed useful and suggestive papers on the physiography 

 of New South Wales, references to which have already 

 been given at the commencement of this address. Dr. 

 W. G. Woolnough,D.sc., 2 and Mr. F. G. Taylor, b.a., b.e., b.s c ., s 

 have also added to our knowledge of the physiography of 

 this State. The physiographic method of study of earth 

 tectonics is obviously of special value in New South Wales, 

 where along the whole of its Main Divide and coastal area 

 marine strata later than the Permo-Oarboniferous are 

 unknown. In New South Wales there are two chief lines 

 of trend, the older trends, (the direction of which is well 

 shown by the orientation of the trough axis of our main 



1 Proc. Linn. Soc. N. S. Wales, 1909, Vol. xxxiv, pt. 1, by C. A. Siiss- 

 milch, f.g.s., and H. I. Jensen, d.sc, pp. 157- 194; ibid. 1907, xxxn, pt. 3, 

 by H. I. Jensen, pp. 557 - 626, 842 etc. Also for general reference to 

 distribution and trend lines of these alkaline rocks of East Australia 

 together with references, see ibid. 1908, Vol. xxxiii, pt. 3, pp. 491 - 588, 

 and particularly Fig. 10 on p. 585. 



* Ibid., 1906, Vol. xxxi, pp. 546 - 554. 



3 Commonwealth Bureau of Meteorology. Physiography of Proposed 

 Federal Territory at Canberra, Bulletin No. 6, 1910, and ibid. Bull. No. 8. 



