BUNDELCUND. 31 



this Dulchipore conglomerate,) " on the top of the low ridge through which 

 this gorge cuts, the red conglomerate of the Kymores is abundantly 

 found. In the main gorge, about 2 miles off, and certainly not less than 

 250 feet below, the red conglomerate rests on Pulkoa shales at Gopal- 

 poora and on Tirhowan limestone at Sagowni." It is only by means of 

 their respective conglomerates that these two groups can be distin- 

 guished when thus brought into contact. 



The grounds upon which the Vindhyans and the Semri formations are 

 to be considered distinct have now been exhibited: principally the litholo- 

 gical characters of the upper Semri groups, showing considerable chano-e 

 in the circumstances of deposition; and, the evidence of the consolidation 

 and denudation of these rocks before the commencement of the Kymore 

 period. They are related, in that the Vindhyans may be considered as 

 completing the filling in of the same basin of deposition as begun by the 

 Semri beds. 



Supposed isolated outlier of Tirhowan Limestone — I have still to notice 

 the most remarkable feature of the Tirhowan limestone, and that which, 

 if my supposition be correct, will best establish a separation between the 

 Semri formation and the Vindhyans. The supposition is, that the two irre- 

 gular patches near Heerapore, which I have colored as Semri rock are 

 indeed representatives of it ; they are almost exclusively composed of 

 limestone and are completely isolated from any of the rocks with which 

 the true Tirhowan limestone has hitherto been associated ; they lie entire- 

 ly beyond the basin of deposition which has hitherto been the strict limit 

 of extension for this formation, being separated from it by a high ridge of 

 Bijawur and of lower Semri rocks ; they rest on Bijawur or on crystal- 

 line rocks and are not seen to be covered by any thing : my only reason 

 for considering them to be Tirhowan limestone is their great analogy in 

 composition and mode of occurrence. Independently of the question of their 

 position in time they present many points of interest. The thickness attained 

 by this limestone is equal to any thing noticed in the Tirhowan rocks ; 



