CHAP. 3. | KADAPAH FORMATION.—CHEY-AIR BEDS. 195 
Further investigation of the country by future explorers may 
eventually show that these interesting bands of rock are partly intru- 
sive, Just as is the case with the hornblendie traps; but as yet there is 
no satisfactory instance of this. "There is plenty of room for the dis- 
covery ; it was utterly impossible that the numerous bands of this rock 
eropping up over the country in rapid succession amongst countless beds 
of shale, could be followed out for their whole distance. Besides, even 
the more decided bands, which are seen at a distance for many miles as 
white lines on the slope of the hills, are every now and then dying out 
and appearing again, and in such cases it is quite impossible to say 
whether they continue to run exactly between the same beds. 
These bands of felspathie traps have, like the hornblendic flows, 
been stronger at two different periods; high up in the group, 
associated with the upper traps, and again low down in the lower 
flows. But it would seem from the prevalence of outcrops along the 
lowest slopes of the northern part of the Gundycotta range and 
of the western part of the Oopalpad plateau hills, that the volcanic 
ejections were then more felspathic in their constitution than was the 
case at the time of the pouring out of the more westerly or lower 
flows of hornblendic trap. 
It is unfortunate that the map was not on a sufficiently large scale 
for the delineation of these bands; but they are so numerous, and yet so 
thin of themselves, that this could not be done. On the other hand, the 
limestone bands occurring in this group of rocks are, though not of any 
great thickness, still few enough to be represented; and they are of 
sufficient industrial importance to necessitate this. 
The next peculiar and most striking feature in the Tádapurtee 
slate series, and which is not seen in any other 
Trap flows. 
of the numerous slate groups of the KADAPAH 
rocks, is the presence of two bands of great trap flows, which crop out 
along the whole extent of the field between the Paupugnee and Kistnah 
(SS .) 
