1856.] Proceedings of the Asiatic Society . 251 



Bengal and of Central India, (The latter resting quite unconfonn- 

 ablj on the former). 



That from the absence of organic remains, there was as yet no 

 evidence on which to base a reference of this group to any estab- 

 lished epoch of European geology. (It might be Cambrian). 



That the names hitherto assigned to this group and its subdivi- 

 sions being based on erroneous views of position, and therefore 

 tending to erroneous conclusions, must be abandoned. 



For the whole formation Mr. Oldham proposed the name Vindhyan, 

 stating that it appeared most desirable that the general physical 

 relations of the rocks should be determined, and the several groups 

 established on such evidence derived from the actual arrangement 

 and sequence of the rocks rather than from some fancied or imper- 

 fectly established analogies derived from partially collected or parti- 

 ally examined organic remains. When the actual sequence of the 

 various groups had been established, wherever this was possible, the 

 organic evidence would be valuable. Applying the name Vindhyan 

 then to this great group as being best seen in the well exposed 

 scarps of the Vindhyan range, he would propose as distinctive of 

 the subdivisions in ascending order, the names Kymore, Eewah and 

 Bundair. These minor groups were only given provisionally, as it 

 was possible that more detailed examination would shew that there 

 was only a twofold division, and that the Sewah limestone and 

 Bundair sandstone were only repetitions of the Soane valley lime- 

 stone and sandstone produced by faulting. 



Eesting unconformably upon the Vindhya formation, there was a 

 considerable thickness of sandstones, shales and coals, (in Central 

 India much disturbed, and traversed by trap dykes). The total 

 thickness of this group in this district exceeded some thousand feet. 

 In these beds occurred numerous fossil plants, which thoroughly 

 identified these rocks with the coal-groups of Burdwan, of Hazaree- 

 baugh and of Cuttack. No additional evidence tending to settle 

 the doubtful question of their true geological epoch had been 

 obtained, nor on the other hand anything to shake the probability 

 of their Jurassic date.* 



* Taking it as proved that the strata at Kotah, from which the fish and Sauriau 

 remains had been obtained, were the same with those of Kampti near Nagpore, the 



