PRESIDENTIAL ADDRESS. 29 



Buchau and Bindi limestones lie in troughs also approxi- 

 mately meridional. A very strongly marked trough is that 

 in which lie the so called (on the geological map) Devonian, 

 by others considered Carboniferous, rocks of the Mitchell, 

 Avon, and Macallister River regions. These strata con- 

 tain in places Lepiclodendron australe. They mark a 

 strong N.N.W. to S.S.B. trend line from Mount Wellington 

 5,363 feet to Mount Howitt and beyond. A good section 

 across this area is given by Professor Skeats. 1 To the W. 

 of the Macallister River a strong fault is marked having a 

 trend presumably about N.N.W. and S.S.E. The upper 

 Palaeozoic rocks of the Mount Wellington and Macallister 

 are shown dipping off an axis of intrusive serpentine. 



With these late Devonian or early Carboniferous rocks 

 folding in Victoria practically ceased. The Permo-Car- 

 boniferous glacial beds are mostly either nearly horizontal 

 or but gently inclined. But near Bacchus Marsh, as shown 

 by Messrs. C. 0. Brittlebank and G. Sweet, f.g.s., 2 they 

 dip in a general southerly to south-easterly direction at 

 angles of from 5° up to in places 45°. As the grooving on 

 the rock surfaces and the carry of the erratics all points 

 to the ice having moved from S. to N., and the whole sur- 

 face of the country was probably overridden by ice from at 

 least as far as Bacchus Marsh on the south to Beechworth 

 on the north, the present Main Divide could not then have 

 existed, but the gathering ground of the snowflelds must 

 have^been situated near to, or south of, the present southern 

 coast of Victoria. The strong southerly dip of the Permo- 

 Carboniferous glacial beds near Bacchus Marsh suggests 

 that the warping up of the Main Divide of Victoria took place 

 chiefly in very late Palaeozoic time, and was connected with 

 the intrusions of the large batholiths of granite which lie 



1 Rep. Austr. Assoc, for Adv. of Sci, Brisbane, 1909, pi. ii, fig. 2, p. 233. 



2 Rep. Austr. Assoc, for Adv. of Sci., Adelaide, 1893. 



