INTRODUCTORY NOTICE. 
In issuing the eighth volume of Tur Memorrs of the GEOLOGICAL 
Survey oF Inpia, I would very briefly ask attention to two or three 
points. j i 
The extensive area described in some detail by Mr. King in the 
following pages forms the most southerly extension in India (so far as now 
known) of a very widely and largely developed series of rocks—the 
LOWER VINDEHYAN,—the prolongation of which to the north covers im 
mense areas in His HraHwEss THE Nizam’s dominions, and still further 
north, extends over a large portion of the Central Provinces? jurisdiction, 
and far into the North-Western Provinces. As will be seen, however, the 
area now described is a complete basin in itself, surrounded on all sides, 
and cut off from all continuations of the same formation by the older 
metamorphic or crystalline rocks on which this series rests. It 
cannot be supposed that a full knowledge of the details of the several 
groups or sub-divisions of this formation, and of the variations which these 
exhibit in thickness and 1n relative importance within different areas, can 
be acquired in any one portion of their limits, however complete in itself 
or extensive that portion may be. "The detailed description of these rocks 
within the Karnúl and Kadapáh districts will, however, unquestionably 
prove valuable as a key to their structure elsewhere. 
` The Atlas of India maps of this part of the country are of old date, 
and never have been brought up to recent knowledge by the addition of new 
roads and other features. They are undoubtedly deficient both im accuracy 
and in detail; but, as they were the only plans which there appeared 
the slightest probability of our finding available for perhaps generations 
to come, they have been employed for the recording of the observations 
of the Geologieal Survey, so far as they go. No systematic effort has 
