838 DIAMOND-DEPOSITS OF COPETON, N.S.W. 



7. PiTTMANN, E. F. — Mineral Resources of N. S. Wales, 1901. 



7a. Annual Report of the Department of Mines of N. S. 



Wales, 1904. 



8. Stonier, G. A. — Annual Report of the Department of Mines of N. S. 



Wales, 1894. 



9. Thompson, J. A. — Geological Magazine, November, 1909. 



10. Wilkinson, C. S. — Mines and Mineral Statistics of N. S. Wales, 1875. 



EXPLANATION OF PLATES XC.-XCIL 



Plate xc. 



Fig. 1. — Inclusion in the Oakey Creek granite, near its junction with 

 Cope's Creek, showing large phenocrj'sts of felspar set in a ground- 

 mass of felspar and biotite. 



Fig. 2. — View of Copeton from Soldier Hill, looking east. The foot-hills 

 in the distance mark the trend of the Tertiary lead from the Deep 

 Shaft to the Old Farm. 



Plate xci. 



Fig. 1. — Oakey Creek, showing the mouth of the tunnel in which a diamond 

 was found in the matrix. 



Fig. 2. The bed of Cope's Creek, near its junction with the Gwydir, show- 

 ing remarkable triangular depressions left after a small flood. 



Fig.3. — The Oakey Creek dolerite, showing felspars, augite, ilmenite, and 

 chlorite. Note the small hexagonal section of quartz embedded in 

 chlorite. 



Plate xcii. 



Geological Map showing the Tertiary Leads of the Copeton Diamond- 

 field. 



