BY THE REV. J. MILNE CURRAN. 



189 



that the Rev. W. B. Clarke records four diamonds as coming from 

 the bed of the Macquarie, near Suttor's Bar. None have been 

 discovered of late years. 



vii. Rocks of Bathurst. 



In enumerating the rocks of Bathurst, 1 think it well to define 

 the terms used in describing the igneous rocks. It makes little 

 matter what system of nomenclature one follows, provided always 

 that the terms are clearly understood. Throughout this paper the 

 rock names will be made use of in the sense here indicated. 



ROCKS OF BATHURST. 



Igneous Division. 

 A. Plutonic Acidic Rocks. 



1. Amphibole granite. 



2. Granulite. 



3. Aplite. 



4. Graphic granite. 



5. Greisen. 



6. Porphyritic granite. 

 7. Felsite. 



B. Volcanic Basic Rocks. 

 Basalt. 



Sedimentary Rocks. 



A. Argillaceous. 

 1. Clays. 2. Slate. 



B. Arenaceous. 

 1. Sands. 2. Sandstone. 



C. Calcareous. 

 Limestone. 



3. Conglomerate. 



1. Hornfels. 



Altered Rocks. 

 2. Schists. 



3. Nodular schists. 



