88 - MALLET,, VINDHYAN SERIES. 



limestone. The shaly band above the limestone is similar to the beds 

 below. 



The Rewahs of the Dhar forest^ as previously explained, form a 

 shallow sjoiclinal, the highest beds therefore being in the centre or 

 trough j these consist of red and green earthy, slightly micaceous and 

 calcareous shales capped by sandstone, which bear a considerable though 

 not a strong resemblance to the Gunoorgurh shales more to the east- 

 ward. It is possible that they do represent the lower Bundairs, but 

 doubtful; the lithological characters of the lower Bundairs vary so little 

 between the Eewah country and Hoshungabad, a space of nearly 300 

 miles, that it seems improbable they would alter so much between 

 Hoshungabad and the Dhar forest. Hence, as the point is doubtful, 

 these beds have on the map not been separated from the Eewahs. 



In following the lower Bimdairs westward from Rewah, a good 



section may be found 30 miles north-west of that 



Bundelkund. • ,1 i -n > t^ < i ,, • ^^^ « « 



town m the mil at Kotar^ where there is 225, feet of 



limestone, the bottom beds not included. Resting on this rock with a 

 sharp division are some yellowish-grey aluminous shales which, higher up, 

 become red. West of the Tonse (as also to the east, but to a less extent) 

 arenaceous bands are very frequent in the limestone, and subordinate bands 

 of limestone also occur above the main run. Rippling is often observable 

 in the impurer parts. The black chert, which is so common about Rewah in 

 the form of thin seams and flattened nodules parallel with the bedding, is 

 very rarely met with west of Nagode. Owing to its comparative hard- 

 ness, the limestone determines a slight elevation of the ground along its 

 outcrop which influences the drainage of the valley between the Rewah 

 and Bundair scarps. 



The lower Bundair sandstone, which is very thin to the east, first 

 begins to form a conspicuous member of the series to the west of the 

 Kane. Thus, between Hutta and Nursingurh, it forms at intervals a low 



( 88 ) 



