72 MALLET, VINDHYAN SERIES. 



The general character of the upper Rewah sandstone is very similar 



to the Kymore, but more false-bedding is appa- 

 Upper Rewah to the east. 



rent. The rock is generally a mixture of thick 

 massive strata and false-bedded flags, usually hard and compact, and 

 often glazed or semivitrified ; yellowish- and greyish-white in color, 

 sometimes reddish. Excellent sections are exposed in the cuttings at 

 the Sohagi and Kuttra ghats (see Plate 2), and still better where the 

 Jubbulpur railway ascends the escarpment on to the second plateau. Its 

 full thickness in the Rewah district where not denuded is nearly 500 

 feet, but the amount capping the edge of the escarpment is generally 

 much less. 



The strike and boundary, which run along the Kymore bills as far as - 

 that range is continuous, take a sudden turn south near Bilheri, until 

 they meet the fault which brings up the slate series. West of this, in 

 the Nerbudda valley, some of the most intricate geology of the Vindhyan 

 area is found, which, as the Rewahs play a most important part in it, it 

 will be best to describe here. 



The strata at Bilheri and north of it dip at a small angle 



toward the Bundairs, but about two miles soutb- 

 Nerbudda Valley. 



east of the town we come upon a low ridge 



where the inclination is 50° to north-20°-west. If we follow this ridge 



out westwards, it is found to increase in altitude, until near . Kuttungi 



it is not less than 600 feet high, precipitous and serrated in outline. At 



the same time there is a steady increase in the dip, which becomes 



nearly and quite vertical west of Buhoriburi. The valley of Sohar is 



occupied by alluvium, on the south side of which, between it and the 



slate rocks, there is another range of hills also made of Rewah sandstone. 



The bedding is very obscure, but dips to the south as evidenced by the 



mode of occurrence in one place of Lower Vindhyans beneath it. Thus the 



( 72 ) 



