3t KING : NELLOUE PORTION OP THE CAUNATIC. 



of that village, pistacite quartzites are also common, but always associated 

 with schistose and massive hornblende strata, while there is also a further 

 development of the trappean intrusions, this part of the field being just at 

 or near the south-western extremity of the greater trappean development 

 yet to be detailed as extending diagonally across the Swarnamukhi-Kand- 

 le'ru country. Certainly the pistacitic character of the quartzite band seem- 

 ed to me to be intimately connected with the stronger development of in- 

 trusive trap along this particular line of country ; but there are features 

 against this view, such as that the quartzites of both series alongside or 

 on the trappean development of the Swarnamukhi-Kandleru country 

 are not charged with epidote, nor are those above and below the traps with 

 intermediate pistacitic band extending south from Kaluvaya. The 

 more probable view is that we have here a set of quartzites charged with 

 an accessory mineral in a similar way to that of the garnetiferous 

 quartzites and schists a little further to the east, the association of them 

 with the traps being merely a coincidence. 



To the south of, or on the right bank of the Swarnamukhi, the schist- 



, , . ose band becomes industrially important through 



Iron-stone quartz-schists. 



the occurrence of a rather strong development 



of quartzose iron beds iu the ridges extending from Tresulmare to 

 Ircolah, when they are in association with, apparently above, a thick 

 series of hornblendic schists. These are traceable again on the left 

 bank of the Swarnamukhi and run up alongside the great trappean 

 outburst, and are probably, though now broken across and displaced, 

 a continuation of the Dasur series. The proper iron-stone band is 

 on the west side of the ridges extending from Tresulmare, where, how- 

 ever, the country is flat and the outcrop of the beds is only seen in 

 the flat ground below the tank of that village. The rocks on the 

 western side of the iron-stone band are all hidden by alluvial and 

 superficial deposits, but on the eastern side there is a broad belt of 

 the hornblendic schists touching on the great northern high road, and 

 the more acicular form of the hornblende rock is again to the east of this 

 band about Rasanur and Coonrum. 

 ( 14* ) 



