ECONOMIC GEOLOGY. 199 



The age of this old copper mine was not ascertainable from the 

 focal officials, nor from any of the resident natives of whom I made 

 enquiry. It appeared to bave been completely forgotten. A good 

 piece of the ore, richer a good deal than the average stuff, is among 

 the specimens I deposited at the Survey Office. 



The second locality showing traces and mere traces of copper in 

 the form of a few green carbonate stains in- 

 pan°Konda n rua. ' *" the quartz occurs in the great brecciated quartz- 

 run, extending eastward from the high quartz- 

 crested Siddapan Konda ridge. The exact spot is on the highest 

 point (locally) of the ridge, 2\ miles east by north of Hallalgundi. 



Traces of other metals, such as antimony and lead, were met with 

 by Newbold in the Sandur State, but he d3es not give their localities, 

 and I could not trace them, and came across no indications of them 

 myself. 



e. Building and ornamental stones. 



A considerable variety of building stones are raised in Bellary 

 district, and the great majority of them may be set down as granites 

 of different kinds, varying in colour and texture, and the ease with 

 which they can be quarried and dressed. The number of quarries 

 is great, but none are of very large size, and there is room for 

 hundreds more if any demand for the stone were to spring up. Many 

 very handsome varieties occurring in outlying places seem to be 

 quite unknown, and attention will be drawn to them. 



The granites may be classed in two principal groups — (a) close 



grained granites, and {b) porphyritic granites. 

 Varieties of granite. . 



The former are much more extensively quarried 



than the latter, probably because more easily worked and more fre- 

 quently found in sound condition, weather action having in most cases 

 penetrated them to much less depths than it has done the coarsely 

 crystalline porphyritic varieties. The latter, however, when cut from 

 freshly exposed non-weathered masses and well polished, are of very 



( *99 ) 



