CHAP. 3. | KADAPAH FORMATION.—CHEY-AIR BEDS. 211 
must likewise be remembered that different bands of the superincum- 
bent beds come directly on the limestones, as slates at one place, and 
sandstones, which are higher than these slates, in another locality. 
At the same time, denudation has not been the only agent at work in 
this anomalous form of outcrop, for there is the fact that the limestones 
are different in the humpy parts of outcrop to what they are in the 
longer generally uniform parts. 
Coral formation might aecount for these humps, only there is no 
visible evidence of this mode of structure.* ۰ 
Bedding is distinct, though it is irregular; and on this account there 
is some resemblance to deposits from intermittent silicio-caleareous 
springs; such sources would also account in some measure for the 
localization of the abnormal beds of the limestone band. At the present 
day the outcrop sometimes gives, at a distance, the idea of a set of 
splintery travertine terraces having been formed at several points along 
the western slopes of the ridges; but of course this is the appearance 
only of what might have gone on if the scarp had been there when 
these lenticular widenings were deposited. 
There is a wide spread of these silicious beds—though here they 
are more generally well bedded—on the high road from Cuddapah 
to Madras, some four miles south of the Chey-air; but the more 
irregular and abnormal strata are to be seen in the western slopes 
of the hill-ridges to the east of the road. 
There is no representative of these peculiar limestones in the valley 
crossed by the Penn-air; but beds of identical com- 
Similar beds in the 
Bankrapett Hill and of position and structure occur to the north of 
Cuddapah. 
Ontimitta, and along the western flanks of the 
southern part of the Nullamullays. These are best seen under the fine 
Baukrapett hill, east of Cuddapah, where they are about as intrusive- 
* There is decidedly much more of resemblance to coralline structure in the Jwmmulmud- 
goos of the KARNULS, but even here there is no internal strveture corroborative of this. 
) SEI» ز‎ 
1 
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