50 KING: KADAPAH AND KARNÜL FORMATIONS. [PART II. 
in the upper part of the limestones), or the thinner bands of flags, may 
have been partly washed, or weathered, out from underneath and between 
thicker beds, either by current or atmospherie action, and that the 
superficial beds fell in or were tumbled about. 
This lower member of the Khoondairs appears to be nearly 
SU Deo Gs! AN a always present under the shales, except perhaps 
along their boundary east of Koilkoontla and 
Banaganpilly, where unfortunately the rocks are much obscured by 
eotton soil. If the Koilkoontlas do exist along that edge, they must 
be very thin, for one passes within a very short distance from true purple 
shales and argillaceous limestones on to grey limestones of the lower 
group of Jummulmudgoos. Around the confluence of the Kistnah and 
Toongabudra, the Nundial shales have been perfectly denuded to the 
westward, leaving a fine display of the Koilkoontlas; Nundials being 
only seen in one place immediately under the second northern bastion 
of the Kurnool Fort.* Otherwise, the Koilkoontlas show nearly all 
round the edges of the shales wherever there 1s a nullah from the hilly 
sides of the basin, which has eut deeply enough through the talus of 
debris lying at the bases of the hills. On the north-west flank of the 
Oondootla plateau lying between Nundyall and Kurnool, where there has 
occurred perhaps the only strongly marked undulation in the whole of 
the KARNÛL rocks, the Koilkoontla limestones seem to have thinned 
out, for the purple argillaceous limestone shales run quite close up 
to the foot of the east-north-east end of the plateau, and apparently 
directly overlie quartzites, without any intervening band of limestone 
beds. 
* I am aware that Mr. Foote is inclined to disagree with me regarding the occurrence 
of Koilkooatla limestones to the west of the Kistnah and its Kurnool tributaries; but I 
think this case of what I cannot take for anything else but the red-purple N undial shales 
overlying limestones is a great point, in addition to the evident occurrence of the limestones 
at Alumpoor and on the left bank of the Kistnah.—W. K, 
۸ 30 ( 
