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Records of the Geological Surveg of India. 
[vOL. xt. 
attributed to tbe lower Maucbbar beds has also been rendered probable, but in 
general there appears every reason for accepting the views put forward in the 
fo 2 uner paper as to the correlation of the different tertiary groups in Sind. 
It has, however, been found that, in the original classification, rocks were 
included in the Rauikot group, which belong in fact to a much lower horizon, 
and three small groups have been established beneath the lower tertiary sub¬ 
division and referred to the cretaceous epoch. 
Errors in 'previous paper .—Before proceeding to notice the additions since 
made to the Geology of Sind, it will perhaps be best to call attention to a few 
statements in the previous paper which further examination of the country has 
proved to be untenable. The corrected general section will be found below, 
but there are a few details requiring alteration, besides the entire re-arrangement 
of the beds included in the first notice in the Ranikot group. 
The supposed unconformity between the Gaj beds and the Nari gi-oup at 
Tandra Rahim Khan, west of Sehwan,' appears doubtful. Further examination 
of the junction between the two groups has failed to show any clear evidence 
of unconformable overlap. 
The basaltic lava flow® is now shown to be at the base of the Ranikot 
group, and not intercalated, the beds below the volcanic rock being of different 
age. 
Another error is in the statement* * that the Khirthar rocks compose several 
ridges near the Habb river, the southernmost of which terminates at Cape Monze. 
It is true that some ridges near the Habb consist of Khirthar rocks, and that 
the ridge west of the river, not far from the mouth, is composed of that formation, 
but the range terminating at Cape Monze proves on re-examination to be of Gaj 
beds resting on Nari. The mistake was due to the rocks having been first 
examined before the different sub-divisions of the Sind territories had been 
made out. 
Getieral section of rocks in Sind .—The following is the general section of the 
Sind rocks as corrected, the thickness of each group being estimated, as usual, 
where the beds are best developed. Very nearly, if not quite the full dimensions 
given, from the base of the lower Khirthar to the top of the Manchhars, are, 
however, exposed on the Gaj river, where, below the beds classed as lower Khir- 
thars, nearly 4,000 feet of shales and limestones are seen, which probably belong 
to cretaceous formations :— 
> Eec. G. S. I., p. 16. 
2 1. c., p. 22. 
3 1. c., p. 13. 
* In some brief notes published in the Proceedings of the Asiatic Society of Bengal for 
January 1878, pp. 4, 6, all these beds were classed as lower Khirthars, and the thickness of the 
group estimated at 10,000 feet, but subsequent study of Dr. Cook’s descriptions of the Kelat 
rocks has shown that the unfossiliferous lower beds in the Gdj section may, like some very 
similar rocks south of Kelat, be really cretaceous. 
