cHaP. 3.] KADAPAH FORMATION.—CHEY-AIR BEDS. 169 
and Cuddapah by newer KARNÜÓL rocks; but there is no doubt that the 
several patches of outcrop show the same series of quartzites. 
Immediately south of Cuddapah the outcrop is not only con- 
: 9 g 3 E 
SOR aE! Cuddapah cealed, but is at the same time broken by an 
GRE broken. obscure system of faults. 
The strata of the Poolavaindlas are quartzite sandstones, grits, 
Constitution of ub. fags and conglomeratie or pebbly beds; and, 
En Er where the unconformity between these and the 
next lower group is well seen, the lowest beds are full of angular and 
round fragments of some of the subjacent strata. 
To a certain extent, and more particularly in that part of the out- 
crop along the north side of the long Puspulla 
nous re valley west of Banaganpilly, these quartzites are 
traversed by intrusive trap, which, in its flows, has deviated only very 
slightly from the lie of the strata. There are further traces of this intru- 
sive trap at Ulloor on the great canal of the Madras Irrigation Com- 
pany, some ten miles east-north-east of Kurnool: and the rock is again 
seen in the Margooty hills on the Kistnah river. Towards Cuddapah, 
or to the south of the Chittravutty river, the strata are again very 
closely and extensively associated with great intrusive sheets of green- 
stone: indeed, the lowest beds are there lying directly on trap of 
considerable thickness, and apparently quite conformable with it. 
A peculiar feature of the superposition of these quartzites upon 
the subjacent strata is that, for miles and miles 
Unconformity to sub- 
jacent series not always of their outcrop, they are apparently quite con- 
ie formable, when quite suddenly at certain points 
they are found to be lying on the acutely bevelled edges of the lower 
beds and to be full of pebbles and fragments of these. From the 
Paupugnee, nearly up to the Puspulla valley, there are no very clear 
signs of unconformity, except in the cappings which are left on some 
of the limestone hills to the west of the main quartzite ridge, and here 
x C RWI) 
