PART III. 
CHAPTER l.—' Tug KADAPAH Formation. 
While the country to the west of Banaganpily was being sur- 
veyed, it was found that the group of quartzites 
KARNÜLS rest quite ۷ $ 7 2 
unconformablyonanother at that town in which the diamond mines are 
series of rocks. 
excavated rests on the up-turned edges of a 
series of slaty shales with bands of limestone, accompanied by trap 
flows and other ancient voleanie deposits, such as ash beds and fine muds. 
Further investigation showed that these shales, &c., formed a group 
in a totally different series of rocks, and that the above unconformity 1s 
general all over the great area of country now being treated of. 
These same Banaganpilly beds are also seen to be lying nearly 
as unconformably over other strata of the older series as in the Gunny- 
gull ridge to the south of Kurnool, and again further south, about half 
way to Banaganpilly. In these three instances of Banaganpilly, 
Gunnygull hill, and the intermediate country, quartzites of the lower 
group of the kARNÜLS are lying over three different groups of the 
older series. There are likewise other examples,* but these are not so 
clear as those just instanced. 
Further, the Nerjee limestones stretch up over quartzites of the hills 
around Jummulmudgoo, as they likewise do over the beds of the low 
Gardymuddagoo hills east of Kurnool; and, lastly, they are superineumbent 
* As in the Goolcheroo hills to the south-west of Cuddapah, where there are patches 
of quartzite lying clearly unconformably over other quartzites of the older rocks. These 
patches are doubtless of the same rocks as the flat cappings of the outlying hills 
(see pp. 52-94) to the south-west of the Gundycotta hills. The outliers on the low northern 
slopes of the Goolcheroo range to the south-west of Cuddapah town form the rather 
marked and picturesquely rugged run of rocks so well seen in the view in that direction. 
CRA ۱ 
