228 KING: KADAPAH AND KARNÜL FORMATIONS. [PART ۰ 
Chittavail valley south of the Chey-air right up past Cumbum into the 
Doopad and Vinuconda country, which is girt in by the north-eastern 
spur of the Nullamullays and the northern outliers of the eastern ghats, 
striking up to the Kistnah river. 
This sub-group of slates is the most extensively developed series 
in the KADAPAH ROCKS, occurring, as it does, all 
as DER along the eastern side of the field—lying along- 
side the gneiss rocks for the northern half, and inside of the Yella- 
condas for the southern half of the length, except at the southern 
end of this mountain-ridge, when the slates themselves partly form the 
ridges and are finally again brought up against the gneiss by a boundary, 
which is evidently a faulted one. Westward of this they show in the 
Muntaral Cunnama,* over a large extent of the Nullamullays, and again 
over nearly half the Kapapau basin of the Chey-air. 
Over this stretch of country the rocks vary considerably in their 
character, a circumstance which is mainly due, 
Sree a however, to the fact of successive strata being 
every now and then brought to the surface by undulation, of which there 
is a great deal over the whole field. This is intensified from Pore- 
naumla northwards, or rather appears to be so, for the crests of un- 
dulation have not come sufficiently near the surface to the south, there 
being only one clear band of quartzite outcrop? along the rest of the valley 
down to the Penn-air, while there are numerous outcrops northwards. 
Far to the north of Cumbum, in the Waumyconda range (the north- 
eastern spur of the Nullamullays), there are cases 
Folded strata. htl y ۱ 2 
of reduplication and inversion of the quartzite 
strata among and above these slates. Mr. Foote’s descriptions (already 
* The run of east and west valleys crossing the northern part of the Nullamullays 
along which the road leads from Kurnool to Guntoor. 
+ These quartzite bands are the main, if not the only, guides to any clear and ex- 
tensive examples of undulation. 
¢ 228 ) 
