On the Tertiary and Alluvial deposits of the central portion of the 

 Nerbudda Valley, by Wm, Theobald, Junr., Esq., Geological 

 Survey of India, 



The extensive series of beds of an alluvial character which consti- 

 tutes the greater portion of the level ground in 



Alluvial deposits. 



the Nerbudda valley has Jong attracted attention 



from the numerous remains of Mammalia of both extinct and living 

 types which it has afforded. But though various collectors have success- 

 fully devoted themselves to the acquirement of these interesting relics, 

 no detailed account of the beds in which they occur has hitherto been 

 published. 



The beds in question may be divided into two groups, both containing 



the same species of existing freshwater shells ; but 

 Division of beds. . . 



between the deposition of which a considerable 



lapse of time has intervened, as evinced by the extensive denudation to 



which the lower one has been in many places subjected. 



The following general section exhibits the prevailing litholooical 



aspect of either group, though all the beds are 

 General section of beds. 



not of equal value, and each and all are subject 



to local diminution or increase, either from the process of denudation 

 or causes which have regulated and modified locally the original depo- 

 sition of the beds. To this I shall allude hereafter and I will merely 

 premise that the section here given is not derived from any single spot 

 but intended to convey at a glance the constitution and sequence of 

 these beds in relation to each other ; and to exhibit the general litholo- 

 gical characters and arrangement of the strata throughout the entire 

 district, 



