MALLET, VINDHYAN SERIES. 



109 



Hiese^ and it is evident to an observer on the spot that the shale has been 

 gradually cut from under them by the wash of rain. In other cases 

 several hundred feet of rock have been removed in a similar manner. 



A most striking' case in favour of sub-aerial denudation occurs in the 

 large valley which one enters from Kuttungee. It is twenty miles long 

 by about eight broad, enclosed on every side by the Bundair escarpment, 

 500 or 600 feet in height, except on the south-east, where it is bounded by 

 the equally high ridge of vertical Rewah sandstone. In the centre, where 

 the strata have a quaquaversal dip, we find an irregular circle of smaller 

 hills along the outcrop of the lower Bundair sandstone and limestone ; 

 the valley itself being mainly cut out of the Sirboo shales which are 

 capped along the escarpment by the upper sandstone. The only entrances 

 to the valley are the very narrow gorges of the Kair and Bhudur streams 

 and those at Kuttungee and the north-eastern end. (See Fig. 11.) ,If 



Scale 8 Miles =1 Inct. 



Fig. 11, Valley north-east of Kuttungee. AA, Bundair escarpment : BB, Rewah 

 ridge : CC, Hills along outcrop of lower Bundair sandstone and limestone. 



the valley were marine, it is only by these entrances that the sea could 



have gained admission, and it is perfectly inexplicable how it could have 



( 109 ) 



