MALLET, VINDHYAN SERIES. 77 



slope equalling the inclination of the strata or ahout 15°. One is led to 

 fancy from the contour that the valleys have been determined by shaly 

 or softer bands, but on examination this generally proves not to be the 

 case ; two ranges frequently unite into one, so that their number varies 

 in different places. North-east of Bari, they are frequently formed of a 

 number of separate hills with a more or less deep gap between, but from 

 Amraud to Hoshungabad the southern face is unbroken. 



Where the Rewahs are covered by trap north of Diori the beds 

 on which the latter reposes appear somewhat altered by it, but not very 

 markedly so. They are dark-red, fine-grained, vitreous. In the lower 

 part of the scarp similar beds, but less glazed, are mixed with coarse 

 grayish ones, and the lowest seen in the gorge west of Dioree, as well 

 as at Sateri, are very coarse and massive. Some are highly conglo- 

 meritic, with pebbles up to 3 inches diameter, which are mostly quartzite, 

 with a few of red jasper and impure haematite. The occurrence of such 

 conglomerate beds amongst the lowest seen lends color to the idea of the 

 Kymore being represented, as well as the Rewahs, amongst the sand- 

 stones of the Nerbudda valley. In the Hoshungabad region the 

 sandstone is mostly dark red and greyish white, extremely fine grained 

 to rather coarse, and sometimes contaiuing pebble bands ; rather thick- 

 bedded as a whole but flaggy beds are frequent. Such are often pro- 

 duced by obhque lamination. The beds, particularly when massive, 

 have a lenticular tendency. Mica is sometimes met with between the 

 layers. 



The thickness of the Upper Rewahs (possibly including the 

 Kymores), as previously explained, increases enormously from east to west 

 along their southern boundary. In the Rewah country it is somewhere 

 about 500 feet, but not less than 3,000 at Kuttungi. A measurement 

 at Jamghur, in which neither the highest nor the lowest beds were in- 

 cluded, gave 1,700, while a rough calculation at Hoshungabad indicated 



( 77 ) 



