312 REPORTS OF RESEARCH COMMITTEES. 



A.^ — Additions to our Knowledge of the Physiography of 

 New South Wales during the Past Decade. 



{By C. A. Sussmilch, F.G.S.). 



Many important additions have been made to O'ur knowledge 

 of the physiography of New South Wales during the past ten 

 years; the most important of these are, briefly, as follows: — 

 E. C. Andrews, in 1910\ contributed an important paper on the 

 Physiographical Unity of Eastern Australia. In this he describes 

 the general topography, with special reference to the fault-blocks, 

 river-systems, and deep leads. He demonstrates that the whole of 

 Eastern Australia has acted as a single unit throughout Tertiary 

 and Recent times, and describes the Tertiary and post-Tertiary 

 history in considerable detail, and also points out the influence 

 which the changes in the topography have had upon the Austra- 

 lian flora and fauna. In the same year Mr. Andrews- also gave 

 a description and history of the shallow and deep leads of the 

 Parkes-Forbes Goldfield. In the year 1910 also, Griffith Taylor^ 

 described the physiogi'aphy of the Federal Territory at Canberxa, 

 and showed it to^ consist of a serieis of tilted fault-blocks. In the 

 following year Mr. Taylor'^ contributed an important paper, in 

 which he described the physiography of Eastern Australia, with 

 particular reference to the development of the river-systems. He 

 concluded that the Main Divide in Tertiary times was considerably 

 to the east oif its present position, and that the eastern rivers had 

 ccnsidera-bly extended their watersheds at the expense of the 

 western streams. 



In 1911 Professor T. W. E. David-^, in his presidential address 

 to the Royal Society of New South Wales, referred to the lines of 

 Tertiary faulting in New South Wales and the physiographic effect 

 produced by them. 



In 1912 E. C. Andrews'^ prepared and described a relief 

 model of the New England Tableland which added considerably to 

 previous knowledge of the physiography of this region ; he also 

 published an account of the formation and history of the beach 

 a^ Botany Bay". In 1913 E. C. Andrews, in his description of 

 the Cobar Copper and Goldfield^, gave an important contribu- 

 tion to our knowledge of the Central-Western Tableland of New 

 So'Uth Wales; he described this as a low plateau with a general 

 elevation of abont 1,000 feet in the central portions, the surface 

 of which was a peneplain cut out of Lower Palfeozoic strata; resi- 

 duals of an older tableland dotted its surface here and there. 



In 1914 summaries of the existing knowledge of the physio- 

 graphy of New South Wales", prepared by E. C. Andrews and 

 C. A. Sussmilch, were published in the New South Wales State 



