126 KING: KADAPAH AND KARNUL FORMATIONS. [PART TIT. 
that of the kamNÜrs, but rather a complex and broken one :—complex, 
because many of the groups of rocks change in their character as they are 
followed out, sometimes with great difficulty and frequently doubtfully, in 
their display over such a large extent of country, and, in that while over 
one-half of the field they lie easily and regularly almost as groups of strata 
deposited in a marine basin, in the other half they are folded and crushed 
frequently to an enormous extent, and at times faulted very largely: 
broken, in that cases of unconformity and overlap occur between at 
least three sets of strata. 
These unconformities are, however, not so great as to necessitate 
the division of the series into separate formations: indeed they are often 
so obscure that no unconformity is locally recognizable, a feature which is 
probably in great part due to the folding which the formation under- 
went prior to the deposition of the KARNÚLS, and the subsequent 
general alteration, or sub-metamorphism of both. At any rate, the 
unconformity is plainest where there has been least movement, as on 
the western side of the country. 
The series may in this way be arranged in four groups, three of 
Series divisible into Wich are well-marked, in the following descend- 
four groups. ing order :— 
Sreeshalum quartzites. 
Kistnah group 
2,000 feet. Kolumnullah slates. 
Irlaconda quartzites. 
ue | Cumbum slates. 
Nullamullay group ... 
3,400 feet. Byrenconda quartzites. 
Chey-air group 1h v: usi slates. 
10,500 feet. Naggery quartzites. 
KADAPAH FORMATION. 
A 
| Paupugnee group... ee. ac slates. 
{| 4,500 feet. Goolcheroo quartzites. 
The Kistnah group thickens, and stretches well beyond the group 
beneath it, on to and over the ,CRYSTALLINES or 
_. Kistnah group. : : 
GNEISSIC SERIES, and is well displayed over 
