210 KING: KADAPAH AND KARNUL FORMATIONS. [PART III. 
furrowed and occasionally scoriaceous exposed surface is evidently due to 
the silicious laminz running through the rock being left by weathering; 
but it is strange that the old surfaces on which the slates were deposited 
‘were often as irregular. In the latter cases it is frequently coralloid, 
but we could never find any traces of organic structure. Broken surfaces 
generally presented an extremely wavy laminar structure. 
The strange feature about these ribbed and rugged-surfaced masses 
of limestone is that they only occur at intervals where the rock is most 
massive sub-erystaline and compact; and then the bedding is irregular, 
not uniform and even, as it is in the intermediate spaces of outcrop, 
while the outcrop shows a humpy form, thus :— 
Quartier. ARETE E EEE REESE 
Colcareo 
Shales & Slo 
Fig. 32. Diagrammatic view of the outcrop of limestones along the western slopes of the middle 
ridge of hills south of the Chey-air, representing a length of about four miles. 
(l) Limestone. (s) Shales. (g) Quartzite. 
Between the humpy or lenticular thickenings of the limestone 
band, the beds are much more earthy. It is 
Signs of unconformity. 1 i 
unfortunate that no clear section could be found 
showing whether the superincumbent slaty shales are actually uncon- 
formable on these limestones, but in all cases the junction was more 
or less obscured by debris. Occasionally, however, grey surfaces of 
these limestones are exposed, with some of the slates still undenuded, 
and these are lying im hollows and rifts of the lower rock, only here 
again it is not absolutely certain whether these hollows and rifts are 
not due to a contorted surface which might have been produced when 
the rock was in a pasty condition. On the whole, the rugged surfaces 
covered by slates seemed to be partly the result of denudation. It 
(910. ) 
