CHAP. 3.] . KADAPAH FORMATION.—CHEY-AIR BEDS. Td e. 
preferable conclusion seems, however, to be that these pebble beds and 
breccias to which he refers belong to the Poolavaindlas (Naggerys), and 
that they have here thinned out over the subjacent group in the series 
until they lie directly on the gneiss. At any rate, a difference cannot 
be recognized between the quartzites of the long E. W. ridge and those 
of the other ridges closing up to it from the Kistnah hills. At the 
Someesalla pass of the river, the quartzites of the ridge are there overly- 
ing a calcareous set of shales with bands of serpentinous limestone and 
associated trap. These are clearly belonging to the next lower group ; and 
they in their turn rest immediately on the gneiss, having thinned out over 
their lower member which is very persistent in other parts of the field. 
Mr. Charles Oldham refers frequently im his notes to the peculiar 
brecciated constitution of these quartzites, and to the fact of their 
containing fragments of white amorphous silicious rock, in which, 
however, he had not at the time noted the oolitoid structure. It is to be 
remembered that this peculiar structure is not very readily seen in these 
contained fragments except on weathered surfaces. Mr. Foote was the 
first to note this feature: and then I found afterwards that the silicious 
bands in the limestones of the Vaimpullys are mainly so constituted. 
In the Gardymuddoo hills, east of Kurnool, the quartzites are 
full of fragments of these same chert bands, the slopes of the hills being 
covered with the very hard angular debris of the same rock. There 
is alike quartzite sandstone breccia in the patch between the Puspulla 
valley and the Gunnygull line of fault: and here the beds are directly 
overlaid by a great sheet of intrusive, and in places, amygdaloidal trap. 
Thence southwards the breccia and conglomerate beds are not so clearly 
made up of these oolitoid fragments. But they again come in rather 
markedly in the low southerly sloping hills west-south-west of Cuddapah. 
Along this ridge of continuous outcrop the strata are generally thick- 
Er at ¢ ۲ A bedded sandstones and grits, with occasional bands 
outcrop. of conglomerates and pebble beds full of reddish 
jaspers and chert pebbles. They are obliquely laminated and often ripple- 
(CEBIT 7) 
