24.0 KING: KADAPAH AND KARNUL FORMATIONS. [PART III. 
pure compact typical quartzite, unlike the frequently slaty or taleose quartzite of 
the ridge. The overlying slates are coarse silicious and of dark green-grey color. 
“The largest of these three hills which rises close to the village of Noydopulla 
is a pretty regular ellipse, about 1i miles in length by half a mile in width, and has 
an elevation at the highest part of the ridge of 100—150 feet above the valley. The 
hill being perfectly bare, the lie of the beds is conspicuously visible; and a finer show 
of rippling occurs here than in any other place I am acquainted with. Where the 
surface of the hill had been broken into by small quarries, I noticed many places in 
which five or six or more rippled surfaces were exposed one under the other in as many 
beds of the quartzite. Each bed differed from the others in the direction and size of the 
ripple shown; the strike of the cleavage-planes of the slates around and overlying the 
quartzite at the north end is north-by-east. In the small northern hill, though only 
300 or 400 yards to the north, the strike of the cleavage-planes has changed to north-east, 
dip south-east. The absence of cleavage in the quartzite, in addition to the difference 
of color (pale drab) from the dark-slate, renders the line of junction extremely striking ; 
while the presence of a crest-like patch of the slate rising in jagged edges from the 
steep dome of quartzite arrests the eye even at a great distance (from the northward) 
by its resemblance to a classical helmet. The third elliptical dome is presented by a 
tiny hill or hillock on the north-west of the last described. The ellipse is between 
200 and 300 yards long and 30 to 40 feet high, and the curving of the quartzite beds 
beautifully shown. Northward of these quartzite hills slate prevails very largely and 
seems to occupy great part of the Markapoor taluq." 
CHAPTER 5.— BEDS OVERLYING CUMBUM SLATES. 
The Cumbum slates are again overlaid in several parts of the field 
by well-marked and thick sets of quartzites, which 
Cumbums succeeded by 
thick bands of rbzite. Ute A : 
PRSE eg Re or are much more distinctive than those other bands 
whieh eventually in their course of outerop thin out and often dis- 
appear altogether. 
In that part of the Yellaconda range extending southwards 
Southern part of Yella. from a point opposite Kullsapad, the Cumbum 
tondas; slates of the Budvail side are clearly overlaid by 
a great series of quartzites which go to form the maim mass of these 
eastern ghats. 
( 340) 
