30 T. W. E. DAVID. 



mostly a little north of the present Main Divide. At the 

 same time the distribution of these granites between the 

 Strathbogie Ranges and Oape Liptrap suggests that merid- 

 ional trend directions were still operative though on the 

 whole dominated by the E. and W. trends. That the warping 

 was continued into Mesozoic time is proved by the tilting 

 into broad basins of the Wannon, Otway, and Gippsland 

 Trias-Jura strata with their associated coal seams. These 

 E. and W. lines, which may be termed Bassian lines (after 

 Bass Strait), continued to develop during Tertiary and Post 

 Tertiary time. Eocene marine strata along the axis of 

 the Great Valley of Victoria have been raised fully 800 

 feet above sea level. As already stated, the line of major 

 fault, which has given rise to the steep escarpment W. of 

 Bacchus Marsh, appears to have originated in Tertiary 

 time and developed along the Bassian lines as did the E. 

 and W. fault near Sorrento on the southern side of Hobson's 

 Bay (Port Phillip). Nevertheless while the E. and W. 

 warp lines dominated earth movement in Victoria in 

 Mesozoic and Oainozoic times, evidence is not wanting to 

 show that the forces which had produced the old N, and S. 

 trend lines were not entirely in abeyance. 



Mr. Stanley Hunter 1 has shown that the floors of the 

 Tertiary rivers have been much warped, so that for some 

 distances the drainage direction is reversed, so that streams 

 once flowing south like those of Ballarat have now a rising 

 instead of a falling gradient down stream, and moreover 

 they show evidence that their eastern bends have been 

 tilted up showing that the ranges to the east have been 

 uplifted subsequent to the formation of the lead. He also 

 records the fact that comparatively recent fault lines are 

 occasionally met with in the alluvial workings for gold 

 with displacements of about 30 feet, (op. cit., p. 5). This 



1 Mem. Geol. Suiv. Victoria, No. 7, Deep Leads. By authority, Mel- 

 bourne, 1909, p. 4. 



