24, KINO : NELLORR PORTION 01-' THE CARNATIC. 



North of the Swarnamukhi there is a very marked belt of the same 

 Breaks in continuity porphyritoid and, now, rather pasty gneiss running 

 of strike. north-west of Katcheroo to the Kyoor tank for a 



breadth of nearly 4 miles, in which position, however, and with which 

 dimensions it cannot be said to be quite continuous with the wider 

 spread of outcrops in the Kalahasti and Kambak area ; neither are there 

 any fair indications— partly owing to the wide covering deposits of the 



jjver of any curving round in the strike of the foliation of the Kalahasti 



outcrops as towards a contraction into the Katcheroo width. Contrac- 

 tion and even displacement must, however, I think, have taken place, for 

 there certainly are evidences of such in the Kalahasti ridge and in the 

 curious narrow strip of detrital quartzites of Pillameru to the north which 

 has evidently been wedged in here in a most abnormal way among the 

 gneisses. 



Beyond, or to the north of the Rapur tributary of the Saidapuram 

 The porphyritoid belt river > tne Katcheroo-Kyoor belt of grey gneiss 

 changes about Rapur. either dies out altogether or becomes so much 

 altered or changed, or replaced by igneous-looking rocks, as not to be 

 fairly recognisable. The mass of the rock is a pasty -looking aggregate 

 of hornblende, with a little quartz and felspar, and is more of a porphyri- 

 tic syenite, but towards Bodanapali it becomes even more compact and 

 pasty, and then looks more like a grey bedded trap, though it is still full 

 of little masses of grey felspar, and such rock is found extending into 

 the bay of quartzite hills between Gelacapad and Bodanapali. 



For a few miles further north there are only slight traces of a some- 

 Interruptions of transi- wnat similar rock, the country being for the most 

 tion rocks, and faulting. part of abnormally placed quartzites of the Cud- 

 dapahs among micaceous and hornblendic schists much traversed by a 

 west-north-west to east-south-east system of trap dykes; but beyond 

 this point, though there is still great similarity of constitution in further 

 outcrops in the ridges extending from Sudamulla past Panumurti, I do 

 not feel justified in carrying this member of the grey gneisses. There 

 is every evidence that a strong fault runs across this part of the country 

 east-north-east from Rapur, by which the continuity of the Venkatagiri- 

 ( 132 ) 



