PREVIOUS WRITERS. 23 



material was re-deposited as the rocks of the younger Kadapa and 

 Karnul systems. 



The equivalents of Newbold's "hypogene schists " in the Bellary 

 district belong to the system I have called the Dharwar system. 



The great extent to which the contemporaneous trapflows in the 

 Dharwar system in the Sandur are covered up by the haematite 

 talus appears to have led him to underestimate the importance of the 

 trap-elements in the local system. 



He frequently alludes to the existence of actinolite in localities 

 where I could only find pistacite, a pale variety of epidote. As a 

 matter of fact, I never came across a single crystalof actinolite in any 

 part of Bellary and the districts adjoining it, though I found it in 

 various places in Salem district and elsewhere in the south. Pistacite, 

 on the contrary, is exceedingly common in many of the granitoids. 



In 1855-56 a traverse of the Magnetic Survey of India by the 



brothers Schlagintweit was made across the 



centre of Bellary district by one of the brothers 



(Adolf?), but the geological notes he recorded I have not had 



access to. 



In the end of 1869 a geological traverse was made by me through 



Geological Survey of the Adoni taluc h alon g the line of the Madras 



India - Railway and extending for a distance of about 



4 miles on either side. The information then gained was not published 



separately, being of no special interest. The object of the traverse 



was to connect the Azoic rocks of the Kadapa and Karnul basins 



with the supposedly equivalent rocks in the upper valley of the 



Kistna and that of the Bhima. This was done, and the Kaladgi and 



Bhima series shown to correspond to the Kadapa and Karnul series, 



The Manual of the Bellary district, compiled by Mr. John Kelsall, 



M.C.S., and published in 1872, contains a 

 District Manual. . 



sketch of the geological features, drawn chiefly 



from Captain Newbold's notes, and entirely so for the taluqs which 



now form the district, for they, with the exception of my small traverse 



through Adoni taluq, had not been examined by any other geologist. 



( 23 ) 



