262 KING: KADAPAH AND KARNUL FORMATIONS. [PART Iv. 
slates between the ridges and Murryvamla of any quartzite of a similar 
kind to the quartzites which occur to the south. "The limestone is highly 
altered along this line, very crystalline and of a nearly pure white color. 
The quartzites now lying over it are likewise much cleaved and contain 
little, if any, traces of detrital origin. 
It must also be taken into consideration that there is an apparent 
inversion of the strata at many points along the northern part of the 
Yellacondas, and again in the eastern part of the Palnád. Mr. Foote is of 
decided opinion that the greater part of the Yellaconda range towards 
Cumbum shows cases of inversion, as displayed by his sections (see sec- 
tions figs. 36, 97, pp. 220, 222) : and on this account we were for a long 
time led to consider that the quartzites forming the main mass of the 
eastern ridges from the parallel of Porenaumla, southwards to the Penn- 
air river, were overlying the slates of the Budvail valley by a great 
inversion. "This may, however, be explained by a line or lines of fault- 
ing, and the quartzites and slates would then appear to be in their 
proper order. 
In the Palnád area, however, the case is different, for in the eastern 
ridges, there are cases of limestones overlying and underlying the same 
series of quartzites in different parts of the same ridge, which necessi- 
tates an inversion of the strata. Nor is this at all an impro- 
bable arrangement, for there are actual inversions to be seen in the 
Waumyconda range, of which these smaller eastern ridges are only 
prolongations, 
There are then two regions in which the folding of the strata along or 
Two regions of inten. ear to the eastern edge of the field is of different 
sity oF ی ات‎ intensity. In the north the undulations are re- 
peated and the beds are inverted. To the south, or from the parallel of 
Porenaumla, if there be no inversion, * the curves are, as a general 
* Mr. Foote supposes inversion. I am inclined for a system of faults as shall be 
explained further on.—W. K, 
( 269 ) 
