36 T. W. E. DAVID. 



Devonian rocks show a tilt towards the B.N.B., that is in 

 the direction of the main basin. 



If now we examine the important unit of the New England 

 tableland, the following tectonic lines are obvious : — The 

 long belt of serpentine recently described in detail to this 

 Society by Mr. W.N. Benson. This extends for fully 150 

 miles from Nundle to Bingara, striking in a general N.N.W. 

 and S.S.E. direction. The Carboniferous and Devonian 

 rocks have been folded and powerfully fractured along the 

 same line, the pressure coming from E.N.E. from about 

 E. 17° N. (true). Further north in the Emmaville district 

 of New England, the Permo-Oarboniferous, and perhaps 

 Carboniferous claystones, are folded on lines trending about 

 N. 30° W t and S. 30° E., with evidence of the pressure having 

 come from E. 30° N. The trend of the Permo-Oarboniferous 

 limestones near Kempsey is about N. 35° W. (true). On 

 the other hand the great intrusive masses of granite which 

 occupy so large a part of the country between Tamworth 

 and Wallangarra on the Queensland border strike about 

 N. 22° E. (true). This direction is almost exactly parallel 

 with the coast line, and shows that in New South Wales as 

 in Victoria, the axes along which the granites were intruded 

 belong to the newer trend lines which determined the 

 position and orientation of the present coast line. 



Mr. E. 0. Andrews has shown that in the New England 

 district the granites have strongly intruded the Permo- 

 Oarboniferous rocks, whereas in the Lithgow district of the 

 western coal-field rolled pebbles of the Hartley granite are 

 very frequent in the basal upper marine Permo-Oarbonifer- 

 ous rocks of that area. The long axis of the Clarence 

 Basin is exactly meridional (true). Another important 

 tectonic line is the belt of alkaline lavas which form such 

 conspicuous elevated and isolated groups on the relief 

 model, Plate 2, extending from the extinct volcanoes of 



