68 KING: KADAPAH AND KARNÜL FORMATIONS. [PART ۰ 
definite division between the limestones and the shales, yet from 
a distance there is a most decided appearance of division in the group 
into the two bands, shales, and limestones; this feature may be well 
seen on the upper slopes of any of the outlying flat-topped hills of the 
Koilkoontla taluq, as shown in some of the sketches we giye. 
In the middle of the field of KARNÓL rocks, as among the Banagan- 
pilly hills, the buff shales are immediately under the massive quartzites 
of the pinnacled beds with scarcely any intermediate layers of sandy 
material. They are mostly well-marked buff and white, finely laminated 
and (unweathered) hard shales. Along the inner western scarps of the 
hills south by east of Kurnool, the shales are seen more distinctly 
between the pinnacled beds and the underlying limestones, and there 
is rather a sudden change from finely laminated shales to limestone beds. 
‘This decided character of these rocks as a clear band between the 
Paneums and the limestones is very evident all round the scarped 
edges of «the ranges of hills and plateaus between Banaganpilly, 
Kurnool, and the Khoond-air valley, and they are tolerably constant in 
their white and buff colors. In the Oondootla plateau, towards its 
north-east extremity, the rock occurs as a soft, fine, and gritty 
shale of a buff color, and is not unlike the ‘bath brick’ of commerce. 
In the Poolcherla plateau (north-west of Oondootla) which is of 
pinnacled beds, the underlying Owk shales show typically as a thin 
seam in the western scarps, and they sink down at the north- 
north-east extremity of the ridge with the quartzites, and so become 
to a certain extent lost under the cotton-soil which is so prevalent here. 
They, however, show again at intervals up to Nundycotecoor, but 
without any trace of the overlying quartzites. 
The Owk shales are nearly all over the field so beautifully laminated 
Eon be orsi and so recent-looking that it becomes a matter of 
isms. wonder how there are no evidences of organic 
life displayed in them; such is, however, the case. At least, after 
repeated searches among them, we have always failed to find any fossils 
( 63 ) 
