PRESIDENTIAL ADDRESS. 



31 



evidence agrees with that mentioned to me by Mr. — 

 Mahony, b.sc, of the Geological Survey of Victoria that the 

 recent dune rock near Sorrento is heavily faulted to the 

 east of Sorrento in a N. and S. direction with a downthrow 

 to the W. This fault trends northwards through the gap 

 in the range through which the Melbourne to Sydney rail- 

 way line passes to the south of Seymour. 



The homoseismic lines for the earthquakes of May 10, 

 1897, and May 27, 1900, suggest that the older meridional 

 lines and the newer Bassian lines are still being followed by 

 earthquake cracks. 1 The nature of the folding to which 

 Victoria has been subjected is shown on fig. 6 a and 6, and 

 the trend lines are shown on Plate 2. 



SECTIONS across VICTORIA 

 Fig.6(a) 



W 



Clenelg 

 River 



Tertiary 



Grampians 

 Carboniferous Tertiary 



Tertiary Silurian 

 Basalt 



Main Divide Snony Rivet 



Connor's Plain 5500 ? |vtr Wellingfon porphyries 



'Fault 5363 P (Loner Devonian) £ > 



UpperDevonian j w/rfrffe I Ordovician ' 

 Oev 



y- \ \ Pre-' Mv[ - Cambrian < Schists] ^ K 



m 



Granite - 



■Serpentine - -Granite - 



■ -Quartz - ■ 

 ■porphyry 



N. 



Murray River 

 ; Echuca 

 : ' Tertiary 



Hearhcore Harcourt 

 Permu 

 -Carb? 



-450 miles.- Granite ■ 



Fig.6(b). 



Alkaline Lavas 

 Mrivlacedon Permo Carboniferous 

 3300 f 1 Fau,t / Silurian 



Ordovician .' Ba . s S! t '.. \ Porr Phillip Bay f 1 Recent 



Melbourne ^ Terhary f 



PrNepean S. 

 :Bass Srrair 



Dune Rock 



ISO mttes.- 



New South Wales. — The outlines of the chief tectonic 

 features of this State were traced with a masterly hand 

 by the Rev. W. B. Clarke, f.r.s. 2 The late Government 

 Geologist, C. S. Wilkinson, constructed a valuable map o* 



1 Geography of Victoria, by Professor Gregory, p. 175. 



2 Southern Goldfields of New South Wales, and remarks on the Sedi- 

 mentary Formations of New South Wales. Fourth edition 1878. 



