MALLET, VINDHYAN SERIES. 



43 



between this point and Rewasin hill (where also the limestone (11) occurs 

 in one or two places) , beyond which they vanish from the section till we 

 arrive west of Badanpur. Here there is a considerable development, 

 the typical beds being that hard_, black, rock just mentioned, but this seems 

 to become bleached on exposure to atmospheric influences, and hence the 

 strata, as commonly seen, are white, sometimes striped with brown, very 

 fine-grained in texture, laminated, sometimes hard, and then much resem- 

 bling the porcellanic beds, sometimes disintegrating to an impalpable 

 powder. 



The amount of disturbance which the lower Vindhyan series has 

 undergone is great. The general result has been 

 to give the whole a northerly inclination, and this 

 inclination increases in amount from north to south. Thus the lower beds 

 near the slates are not unfrequently thrown up vertically, or even doubled 

 up ; but as we approach the escarpment the strata are observed with a 

 moderate incHnation, that is to say, general inclination ; for the whole 

 series from top to bottom is subject to violent and capricious contortions 

 on a small scale. Fig. 3 shows an instance of such amongst the shales 

 (No. 10) close under the scarp. 



Stratigraphy. 



Fig. 3. Local contortion in shales. 

 Fig. 4 represents another case in the Rotas limestone near Rewasin 



hill, which may be taken as a typical example of the stratigraphy of the 



Fig, 4. Local contortioil in liiiiestone. 



( 43 ) 



