202 KING: KADAPAH AND KARNUL FORMATIONS. [PART ۰ 
> ash/-sandstone—a grey felspathie sandstone-looking rock, which is not 
uncommon on this horizon of the group, further to the north. Below 
these shales, &c., comes another outcrop of trap. In following the base 
of the upper and main trap flow up to the ravine, or gully leading 
down to the bank of the Chittravutty from the summit of the hill, this 
base dips down sharply in a sort of saddle of the lower rocks, and 
rises up again on the other side of the ravine, as shown in the figure. 
The saddle-curve is not illusive, as though it were the section pro- 
duced by the hollowing out of the ravine. The trap has either forced 
its way up across the edges of the lower beds, or it has been poured 
over a denuded surface or hollow in them. The ends of the strata are 
slightly dipping towards the hollow of the ravine. 
The rock is an exceedingly coarse-weathering, large-grained 
greenstone. It weathers out in rough masses, the surfaces of which are 
studded with little rounded knobs, about the size of a large nut, of more 
coarsely crystallized trap, and the ground is strewn with these rounded 
bodies, as it were with the dung of sheep. On one side of the ravine 
there is a buttress-mass of shales and flags, against which the trap 
abuts. In working up the ravine the outerop of trap is sealed for 
a couple of hundred feet or so to the upper surface of the flow, 
where it is a massive compact greenstone with a distinct wall-like 
outerop, and is here overlaid by trappean muds which are weathering 
into a well laminated and bedded rock of a dark green color; and 
these merge into the spotted ash beds of the summit. The shales of 
the buttress on the west side of the ravine are well rippled and 
laminated. This trap is the same as that below the summit on 
the eastern side; and below the buttress of shales it is found, as 
shown in the figure, that the lower trap even comes in contact with 
the upper. 
Looking at the outerops on the western side of Beddadoor hill, 
it would certainly seem quite possible that this peculiar lie of the trap 
(202, ) 
