2,44. KING: KADAPAH AND KARNÜL FORMATIONS. [PART III. 
evidence of such a fault or line of faults; but there are two, if not three, 
lines of dislocation running obliquely at the range of hills; and it is 
hardly possible that these should have stopped short in the sudden way 
represented on the map. Unfortunately, at the time of survey, there. 
was no observation made giving evidence of the extension of these 
faults; and Mr. Foote has been led in his section (fig. 37, p. 222,) 
to admit of an inversion, while the same arrangement of the strata 
might as easily be accounted for by faulting. 
There are again some features about the country west of this part 
; . 4. Of the range which are indicative of faulting. 
Breaks in continuity 
and character of strata 
between Cumbum and 
Kullsapad. 
There is no reasonable way of connecting the 
group of ridges of quartzite of Porenaumla and 
Kullsapad im their foldings with the group of ridges further north. 
There is an evident break in the continuity of strata here. Again, at 
Iddemkall, about half way between these two sets of ridges, there is a 
pieturesque and isolated hill, which, strange to say, is made up of un- 
doubted igneous rock, an island of porphyritie syenite in a plain of 
slates. Another isolated boss of this same kind of rock occurs (accord- 
ing to Mr. Foote) some 13 miles due north-by-west of the Iddemkall 
mass, about a mile north-east of Racherla village. "The immediate 
contaet of this rock with the slates which surround it in both localities 
is obseured by cotton soi. Mr. Foote saw further traces of the same 
rock to the south-south-west of this near Giddaloor, but it is not 
certain whether the syenite is 7 situ. We saw no signs of alteration of 
the surrounding slates nor of their lie. These are the only three points in 
the Cumbum part of the country where igneous rock occurs; and the con- 
clusion is, that they are the summits of peaks around which the KADA- 
PAHS were deposited, or that they have been let in here by faulting. 
There is a third case of break in the continuity of the rocks on either 
side of the southern ends of the series of ridges between the Kullsapad 
ridges and Cumbum, in the entire cutting off, to the north, of the runs 
( 944 ) 
