CHAP. 3.] KADAPAH FORMATION.—CHEY-AIR BEDS. 201 
upper part,a 6 to 10 feet bed of compact grey trappean rock. The 
beds below are purple and dark green (speckled grey), laminated, ripple 
marked, flaggy ash beds ; and then below these again is a great thick- 
ness of blue and purple speckled beds like those at the summit, and so 
by some sandy beds and shales to the bottom of the hill.* 
On the southern slope of the hill, the trap again shows in such 
a way as to indieate that there must have been either intrusion of the 
trap and displacement of the beds, or that the trap must have been 
poured over a very uneven and denuded surface of the underlying 
rocks, after which the higher shales, &c., were in their turn deposited 
tolerably horizontally over an exceedingly uneven surface of trap :— 
Fig.31. View of the southern face of Beddadoor hill. 
(s) Shales. (t) Trap. 
The trap forming the east-south-east base of this hill rises up 
with an easy dip towards the summit. It rests conformably on grey 
spotted shaly and flaggy ash beds, with a sort of intermediate bed of 
* It is worthy of note that there has been a large landslip on the village side of the 
hill, which has given rise to some confusion in the bedding. This landslip occurred within 
the memory of the present villagers ; it did not cause any damage. 
3 B 
