D T. W. E. DAVID. 



It may be added that in the matter of late epeirogenic 

 uplifts of Australia much light has been shed by the palseon- 

 tological researches of Messrs. R. Etheridge and W. S. 

 Dun ; and new and promising line of investigation bearing 

 on recent movements of the East Australian coast line 

 based on the present distribution of our forest trees in 

 relation to soils and geological formations has been insti- 

 tuted by Mr. R. H. Oambage, L.s. 1 



The excellent seismograph records now being published 

 from time to time by the Rev. E. F. Pigot, S.J., from the 

 Seismograph Observatory at St. Ignatius College, River view 

 are yielding invaluable information as to the areas of 

 modern re-adjustment of the earth's crust in the neighbour- 

 hood of Australia. Other references will be given in their 

 proper place throughout this address. 



The relief map of Australia and Tasmania reproduced on 

 Plate 1, was specially prepared for this address by Mr. 

 W. K. Mclntyre of Sydney University, from data generously 

 placed at our disposal by Mr. H. E. O. Robinson, to whom 

 Australian cartography is very deeply indebted. In this 

 relief map the following features at once arrest attention : 



(1) The strongly marked eastern ranges approaching so 

 closely to the coast near Oape Howe and in the neighbour- 

 hood of Hinchinbrook Island and the Bellenden-Ker Ranges. 



(2) The broad basin lying to their west extending from the 

 Gulf of Carpentaria to the Australian Bight with the 

 eastern branch of the Darling-Murray Basin, and the 

 immense western extension around the head of the Great 

 Australian Bight as far west as Oape Arid. The boundary 

 on the south of the Darling-Murray Basin introduces us to 

 a new tectonic element, (3) The Victorian Main Divide in 

 which an east to west line of warping or uplift has domin- 

 ated the older meridional lines, an uplift which is comple- 



1 Report Austr. Assoc. Adv. Sci., Vol. xi, pp. 473 - 483. 



