MALLET, VINDHYAN SERIES. 71 



The Jheeree shales are very similar lithologieally to the Punna ; 

 I'ed, green and yellow crumbling shales divided by thin layers of earthy 

 sandstone. About 20 feet from the top there is a pecuhar band of 

 rather coarse, loose sandstone speckled brown by iron. It is very 

 constant in the section between Nourabad and Busdree_, a distance 

 of 30 miles, but near the latter place it gradually dies out and is not 

 again seen to the south. At Dudhai the shales become calcareous 

 near the base, and. further south there is some 30 or 40 feet of impure 

 shaly limestone. North of the village this calcareous element is 

 entirely wanting. 



The thickness of the lower K-ewahs south-west of Grwalior is thus 



about : — 



Jheeree shales ... .,, ... ... ... 150 



Lower Eewah sandstone ... ... ... ... 280 



Punna shales ... ... ... ... ... 160 



590 

 We find the lower Rewahs again on the north-west boundary 



On north-west bonn" occupying the centre of the synclinals west of 

 ^''^^- Kerowli, which were alluded to when describing 



the Kymores. The lower Rewah sandstone rises in both cases above the 

 alluvium in a weU-formed ridge, but the shales have been denuded away, 

 and are seen only at the south-west end of the southern synchnal. 

 The Punna shales do not require any special notice here. Only a small 

 portion of them is exposed just under the town of Raontra. In the 

 Jheeree shales which are seen at Amargurh, there is a band of limestone 

 at base of the hiU extending 20 or 30 feet up, but the lower part of it 

 is obscured by alluvium. Above it there are between 200 and 300 feet of 

 ordinary Jheeree shale, and over that again a considerable thickness of 

 upper Rewah sandstone ; the band of limestone, no doubt, corresponds to 

 that mentioned at Dudhai. 



( 71 ) 



