SCHISTOSE AKEAS. 15 



east side o£ an acute synclinal fold, the terminal curve of which takes 

 place at the southern end of the ridge, close to the trigonometrical station 

 which crowns the highest summit. The synclinal opens to the north, and 

 the ridges die away and disappear under superficial accumulations near 

 the southern limit of the eastern granitoid gneiss band, which the quartz- 

 ite beds appear to underlie. 



No connection was traced between these Picherla Konda beds and 

 any of the other quartzites. Their position relatively to the great 

 eastern granitoid gneiss band, which they have every appearance of un- 

 derlying, suggests the possibility (if not the probability) of their repre- 

 senting the quartzites underlying the Chandra Sekharapuram granitoid 

 band. 



Of the quartzites in the Chundi hills only one set requires special 



notice because of their extent. These form the 

 Chundi hill quartzites. 



Chundi trigonometrical station hill, immediately 



north of the village of Chundi. Here as well as in the Picherla Konda 

 the beds are many hundred feet in thickness. 



Another set of quartzites shows in the flat jungly country south- 

 west of the Chundi hill group. They form two 

 Ianekotai quartzites. 



small but striking hills, one at Ianekotai (Iana- 



cotah), the other at Iawarpalle. They are of much smaller thickness 

 than the Chundi hill beds, but like them rest upon a great series of highly 

 hornblendic schists, and it is very probable they both occupy the same 

 horizon in the general succession of the gneissic rocks. 



Overlying the Chundi quartzites are mica schists which in many 

 Staurolite beds of parts are very thickly crowded with prisms of 

 Mala Konda, &c. staurolite (staurotide) , in others again with crys- 



talline masses of pale blue kyanite (disthene), or with both minerals 

 mixed up confusedly. The mica schist charged with both these minerals 

 is best seen on the Mala Konda, the south-western extremity of the 

 Chundi hills. It there rises into a considerable hill with a craggy sum- 

 mit, crowned with a small Vishnu temple, one of the most frequented 



( 15 ) 



