MALLET, VINDHYAN SERIES. 41 



a certain amount of attraction on those surrounding it, producing a distor- 

 tion of shape in them. From this cause the symmetry of form increases 

 with the distance of the concretion from any others. Also, as the 

 quantity of lime is limited, the size varies inversely as the number. 

 They occur of every size, from 6 inches to 3 feet or more in diameter. 

 In many places the layers of shale are found to bend round them more or 

 less, thus furnishing an index to the amount of vertical compression 

 which the rock has undergone since its formation. The strata found in 

 the extreme west are quite similar to these, gradually passing above into 

 limestone. East of Agoree the concretions are absent, or rare, and the 

 junction sometimes perfectly sharp. 



The next member is the most constant and important of the whole 



series. It is that exposed in the Doorgowtee 

 9. Limestone. ■, • • n 



valley, bemg m tact the only lower Vindhyan 



rock occurring on the north side of the Kymore plateau, save that doubt- 

 ful conglomerate north of Sasseram (p. 32) . From Eotasgurh it may 

 be followed westwards to Mungesur hill. Hereabout it is obscured by 

 alluvium for some miles, but the band which reappears north of Agoree 

 Khas, and which there can be no reasonable doubt is the same, has been 

 traced thence continuously to the western limits of the series. It 

 usually occupies the lower part of the escarpment and the country near 

 the base. Between Mungesm^ hill and Eotasgurh the whole consists of 

 strata averaging from 1 or 3 to 12 inches or so in thickness. To the north- 

 east the rock is very thinly (| to 1 or 1 inch) and evenly bedded, the 

 same layer being generally traceable the length of the section ; south-east 

 of Chynepur, for instance, it occurs in strata of ^ to 4 inches, varying in 

 color from light to dark grey, sometimes with a pinkish tinge. It is a 

 hard tough silicious rock, and contains occasional layers of thinly bedded 

 and thinly laminated shales, varying in composition from earthy to highly 

 calcareous. At Budokur, 10 miles south of Sasseram, the limestone is 



( 41 ) 



