of a Route from Madras to Bellary, in 1 822. 359 



The western approach to these hills, for one mile and a 

 half or two miles from their bases, was thickly strewed with 

 nodules of several varieties of sandstone, the most common of 

 which were of rather a close fine grain, sometimes so much so 

 as hardly to be distinguished from quartz or hornstone. The 

 finer-grained varieties were of different shades of red or brown, 

 but generally of a light colour. There was also great abun- 

 dance of a very coarse variety, composed of rounded pebbles, 

 and fragments of quartz of all sizes, in the same specimen, 

 from that of a pin's head to two or three inches in diameter, 

 imbedded in a dark green basis. This variety was very re- 

 markable. It was composed of rolled fragments and pebbles 

 of quartz, which were generally of a white colour in a ground 

 of dark green. The cement appears (on the march from 

 Naggery to Potoor there were rolled masses of this variety 

 twelve to eighteen inches diameter) to be hornblende, which 

 communicating its tinge to the finer and transparent particles 

 of quartz, affords a beautiful contrast to the large white peb- 

 bles imbedded in it. These nodules I should be disposed to 

 trace from one or both of the two first-noticed portions of the 

 cap, but I met with no fragments of any kind of schistus, owing 

 perhaps to my not having approached sufficiently near. It has 

 been noticed that the summits of this group of mountains, of 

 which Naggery Nose forms the southernmost point, are mural 

 and precipitous to the east and south, while to the north they 

 fall gradually away, till they nearly coincide with the general 

 level of the country. This latter appearance is very striking 

 from Curcumbaddy, where the whole of that group is seen in 

 reverse ; Curcumbaddy itself being situated at the foot of one 

 of these declivities, being a prolongation of the Tripetty 

 range, which, from its outline and general aspect, I would infer 

 to be of similar structure with that of Naggery. 



The clay-slate, which occupies so great a portion of the 

 subsequent route, first makes its appearance at Curcumbaddy; 

 but the accumulation of sand and alluvial soil in the Tripetty 

 valley, which is crossed on leaving Woramallipett, prevented 

 my thus far tracing the continuity of the granite, although it is 

 to be observed, with occasional beds of green-stone, in several 

 parts of the road. The last rock I recollect to have passed 

 before reaching Curcumbaddy was a bed of porphyritic green- 

 stone, about one mile and a half or two miles from the village. 



rock, and that sandstone. From this, and other corroborative instances 

 on the route between Cuddapah and Ryachootee, I have little doubt that 

 the caps of the Naggery range, of the great mass of hills east of that line, 

 and, in short, of all the ranges exhibiting the same remarkable outlines, 

 consist of varieties of sandstone or conglomerates. 



The 



