CHAP. 1.[ THE KADAPAH FORMATION. 12 
that part of the field traversed by the Kistnah. Besides the fact that 
there is an overlap, there are some grounds for considering that the 
series is unconformable to the subjacent group. 
The Nullamullay group, as the name implies, is largely developed 
in the principal range of mountains in the 
Nullamullay group. E Y 
district. It is uneonformable to and extends 
beyond the edges of still lower quartzites and slates. 
The subjacent group is traversed by the Chey-air, after which 
Wai ds river it is named, more particularly as there is no 
large town in the field by which to distinguish it. 
The lower beds of this group again extend far beyond the southern 
limits of the Paupugnee strata, and likewise rest 
ud on their denuded edges. 
This lowest group finally reposes on the floor of granitoid gneiss 
of the ancient KADAPAH sea: and it is now most characteristically seen 
on that part of the course of the Paupugnee to the west of Cuddapah 
town. 
The grouping of this formation was for a long time a very diffieult 
Difficulties in the way Matter, for, until the whole area had been com- 
g uie series. pletely surveyed, the different series of slates and 
quartzites could not be traced into connection or association. As it 
happens, the KARNÓL rocks cover up almost the whole of the middle of 
the field, and thus the absolute tracing out and connection of the 
various outerops of the older strata which are so well seen in the eastern 
and western portions of the country was to some extent impossible. 
Then it was found that some of the groups on either side could be 
Just connected or run into each other at the northern or Kistnah end, or 
partially in the middle of the area. 
At the Cuddapah edge of the field, this connection is not capable 
of being perfectly traced, owing to a series of small faults, but there 
are lithological and stratigraphical features here displayed which are 
(OESTE) 
