26 KING : NELLORE PORTION OF THE CARNATIC. 



dous deal of quartz in the form of irregular segregations and very in- 

 distinct veins. The micaceous and talcose forms occur in greatest force 

 on the right bank of the Penner, between Kaluvaya and Thalagapur, 

 whence they run to the south-east as a narrowing but tolerably distinct 

 set of strata as far as Saidapuram. About halfway down the southern 

 course of these, and on their western side, come hornblendic schists, oc- 

 casionally massive (coarsely crystalline with radiated assemblages of 

 short needles of hornblende), but mainly schistose and acicular, and 

 these gradually increase in width and persistence down to the Swarna- 

 mukki. To the north of the Penner the hornblendic and more highly 

 schistose bands are not quite so distinct, though they are traceable as 

 such for some short distance on towards Udayagiri. 



Eastward of a line drawn from the latter village past Yarabali on 



the Penner through Tummulatalupuru to Ojili 

 Less schistose band. . in 



on the owarnamukki, the rocks become gradually 



coarser and more distinctly bedded, though there are still frequent 

 intercalations of fine mica schists with a more quartzose constitution, 

 with separate beds of quartz-rock or quartz -schist. 



About Saidapuram and Tummulatulapuru there is a strong run of 

 Garnetiferous band garnetiferous strata, and this is traceable at inter- 

 eupriferous. ya j s ^g^ u p ^ ^ e northern edge of the sheet, 



where also are associated cupriferous schists well known as the copper 

 beds of the Nellore district. The garnets in these beds are sometimes 

 quite remarkable in their size, beauty of crystallization, and number. 

 Towards the line of Nellore and Giidur, a few thin outcrops of more 

 Ridges of massive massive grey gneisses of quartz felspar and horn- 

 blende occur, and these are, if anything, in greater 

 force to the northward on the other side of the Penner near Buchireddi- 

 palem, where this rock has been quarried for the new pagoda at Nellore. 

 With this exception, however, there are no strong or distinct representa- 

 tives here of the more massive gneisses of the Madras, South Arcot, and 

 Trichinopoli districts, which are more apparently represented, however 

 poorly, by the Kalahasti outcrops of the massive crystallines. 

 ( 13i ) 



