42 HUGHES : SOUTHERN COAL-FIELDS OF REWAH G<5nDWANA BASIN. 



than was formerly supposed, and in the absence of collateral strati- 

 graphical evidence, I have preferred to retain all the coal-bearing rocks 

 under one denomination. 



With the exception of the lowest beds of the group around Saranpur, 

 Dhamni, Amiliha, and Dhirauli, there is a common type of feature in all 

 the sandstones, until the unmistakable ferruginous sandstones of the 

 supra-Barakars are reached. There is no representative here of the 

 iron-stone -shales group, which, coming between the upper and lower 

 coal measures of the Damuda valley fields, makes the separation of the 

 Damuda series in that region a matter of extreme facility ; and though 

 it is a fact patent to every ordinary mind that where little or no disturb- 

 ance has taken place, lower beds must necessarily be older than upper 

 ones, there is nothing sufficiently distinctive either in the distribution of 

 the plants or the succession of the strata to call for further sub-division. 

 It would involve a tiresome rehearsal of a multiplicity of names 



Boundaries of SoMg- to describe the course of the boundaries of the 

 pur field. Sohagpur field. I would refer the reader to the 



large map; from which it may easily be perceived that the supra-Barakar 

 and Lameta groups are unconformable to the Barakai's. Nearly through- 

 out their entire extent the boundaries are natural, the only doubtfully 

 faulted portion being that in the Jbilmili area, where a fault was mapped 

 by my late colleague Professor V. Ball. 1 I was not able to make an 

 independent inspection of this feature, but I assume that my views 

 would have been in accord with his could I have devoted enough time to 

 the study of the question. 



Dip northerly, at low There is a general dip to the north at low 

 an S les - angles, implying very slight disturbance. 



In an Appendix a list has been drawn up of all the sites at which 



List of coal outcrops coa ^ nas Deen noticed. It presents a formidable 

 in Appeudix. length, but this bears evidence rather to the fact 



that so far as mere plodding was concerned it was energetically carried 

 out, and not that there is a super-abundance of coal. For such a wide 



' It is marked in his map of the Bisrampur coal-field, which lies to the south-east of 

 Jhilmili (Records, Geological Survey of India, Vol. VI, part 2). 



( 178 ) 



