188 NERBUDDA DISTRICT. 



ed along its strike* to the south, (that is away from the boundary) 



which may be done in the valley of the Hurd, the 

 Also in receding from J 



boundary, same change in its characters is seen to obtain, 



that is, it becomes less coarse, in proportion to the distances from the 

 boundary, and finally passes into the ordinary sandstone. 



Thus it appears that the present boundary of the Mahadevas, along 



this part of the hills, coincides or nearly coincides 

 Mahadeva Boundary L 



a shore line. w j' tn t ne sno re line of the area of deposit of the 



formation. The conglomerates mark this shore : large angular fragments 



of rocks which occur close by, are embedded in the comminuted detritus 



of these rocks themselves ; while elsewhere ancient shingle beds show 



where the wave action has ground down the blocks submitted to its 



influence, until only small rounded pebbles of their hardest portion remain. 



It was stated above that the calcareous portion of the Mahadevas was, 



... like its conglomerates, apparently confined to the 

 Calcareous section of ° " "^ 



the Mahadevas. vicinity of the northern limits of that formation, 



and these calcareous portions may conveniently be taken as a third sub- 

 division of the group lithologically considered, subordinate however to 

 the sandstones and conglomerates above mentioned. 



About 15 miles west of Patroda (see map) a stream issues from the 

 south escarpment of the valley through a fine 

 gorge, at the mouth of which the village of Sal i 

 stands. The Mahadeva sandstones and conglomerates which form the 

 steep sides of this glen are all calcareous to some extent, and are inter- 

 stratified with lenticular bands of what may be called a siliceous in- 

 durated marl, or an impure sandy limestone, or else a calcareous sand- 

 stone, as this or that ingredient predominates. 



To the south, the calcareous element predominates much, and for a 



* By the strike is here meant its out-crop along the steep and often precipitous sides of 

 the glens. The beds are nearly horizontal, and thus a single bed can be often followed for a 

 considerable distance. 



