GllAP. I.] ECONOMIC GEOLOGY. 20.1 



Although, therefore, it is not to be anticipated that a record of 

 the Economic Geology of the districts surveyed may lead to any- 

 immediate results of importance, it may be useful at some future 

 period, iu directing attention to their mineral capabilities, such as 

 they are, and may be the means of saving much time and expense 

 in the institution of special mineral surveys, when the increased 

 wealth of the country shall have created a demand for raw materiala 

 now comparatively worthless. 



The chief minerals of economic value met with in the course of the 

 Survey are as follows : — 



Building Stones, Stones for Road-metalling, &c., including Gneiss, 

 Green-stone, Crystalline and sedimentary limestones, Sandstone 

 and Laterite. 



Limes and Cement Materials ; comprising Crystalline limestone. Coral 

 reef and other sedimentary Limestones, Septaria, Kunkur and 

 Fossil Shells. 



Brick Clays. 



Fine Clays and Pottery materials, viz. : Pipe Clays and Ferruginou.'] 

 Clays, Kaolin and China Stone, Felspar and Flints. 



Gypsum. 



Common Salt and Soda. 



Iron Ores. 



Copper Ores : — only in very small quantity. 



Ornamental Stones, viz. : Shell and other Marbles, Rock Crystals. 



Cairngorums, Jasper. 



With regard to many of the above, such as certain of the 

 limes and clays, it is difficult to pronounce upon their value. A 

 few only are used by the natives, or by the Officers of the 

 Public "Works, and experiments would be necessary to deter- 

 mine how far the other materials are applicable to various 



purposes. 



B 2 



