70 MALLET^ VINDHYAN SERIES. 



Although Loth the Rewah shales are extinct from Kanoura to beyond 



the Betwa^ it is not clear that the lower sandstone is so also. Where 



the shales are last seen, and where, consequently, the sandstone can be 



last distinguished, it retains its full thickness, and it also occurs in fall 



force when first recognizable in the Gwalior dominions ; so that the 



probability would seem to be that it exists in the interval also. There, 



however, the physical features of the ground, in the absence of lithologi- 



cal evidence, are not sufiiciently strongly marked to allow of any 



separation of the different sandstones, and the question is further 



complicated by the overflowing trap. 



As we travel northwards from Chandairee this confusion lessens, 



„ ,, and gradually the different sandstones stand out^ 



Gwalior. ° '' 



from each other, each marked by its own escarp- 

 ment. At Ranod these are clearly delineated. The Rewah group 

 generally, in the Gwalior district, resembles very closely, considering 

 the distance between, the corresponding strata in Bundelkund. The 

 junction between them and the Kymores is exceedingly sharp. Upon 

 the massive beds of the latter are the thin earthy shales, as earthy at 

 the base as elsewhere. They consist of alternations of red and green 

 earthy beds, with layers of fine slightly earthy micaceous laminated 

 sandstone, varying in thickness from 1 to 6 inches, mostly about 2. 



They pass gradually into the sub-division above ; the earthy beds 

 become more and more silicious, until the rock graduates into a finely 

 laminated thin-bedded micaceous sandstone. Above the strata are more 

 massive, of rather loose and coarse white sandstone. The lower Rewah is 

 mostly coarser, less hard and compact than the Kymore, generally white 

 in color, and very often contains small ferruginous brown specks. The 

 beds, although very thick, are seldom so massive or irregular. It 

 occupies a more important position here than in Bundelkund or Rewah, 

 sometimes attaining a thickness of over 300 feet. 



( 70 ) 



