CHAP. 5.] KADAPAH FORMATION.—KISTNAH BEDS. 251 
close up together in the most untoward way. For example, the 
Innaparatyconda, which is capped and flanked in its northern slopes by 
a thick and massive series of quartzites, shows strata which are to all 
appearance dipping northwards under the slates of the Venkatreddy- 
polliam valley ; and yet they disappear in the most mysterious manner 
to the east and west. They may, of course, bean intercalated series in 
the Cumbum slates, answering to the curious oval ridge of quartzite 
which curves round past Chapulmudgoo; but then again it is impossi- 
ble, owing to breaks in the continuity of the strata in the neighbourhood 
of Doopad, to say what the Chapulmudgoo band may be representative 
of in the country south of Doopad, where there are again bands of 
quartzite of the Byrenconda beds—unless it be of Byrencondas them- 
selves. This seems the most probable solution ; and that the continuity of 
the beds is in this region broken by hidden faults and crushed; and that 
their regular outcrop southwards has been here crushed out of form. 
In this view the slate south of Chapulmudgoo must belong to the 
group subjacent to the Byrencondas, while the Chapulmudgoo beds 
are Cumbums proper. ۱ 
It then turns out that the Kistnah beds overlie the Cum bums 
| very clearly along the south-eastern, or Doorgapa- 
Kistnah beds overlie 
aoe. conda, slopes of the hills; and thus they may 
answer to the Nemillygoondum or Yellaconda beds. 
On working up to and over the Kistnah range by the stream 
O ain Kistah flowing downto Veerabudrapore, or Venkatreddy- 
Ber polliam, the coarse dark colored clay slates, &c., 
are overlaid by a thick and sharply undulated set of quartzites, above 
which again are more earthy and sandy, fine, red and purple slates and 
shales, at the top of which 1s a thin band of quartzites near the crest 
of the steep slope, which to the westward forms the summit of Doorgapa- 
conda. Over these again comes a thin series of red, sandy, slaty 
shales, and then the highest massive and white quartzites, which form the 
[5954 |} 
