THE DAMtJDA SERIES. 45 



The section in the Potanga river is continuous and measurable. It 

 occurs about 300 yards below the junction of the Potanga and l/rimari 

 riverS;, ascending : — 



1. Coal seam, thin, dip 20° ■* 



2. Carbonaceous shale .,, ... ... ... 6' 8" 



3. Coal ... ... ... ... ... 7' 3" 



4 Sandstone ... ... ... .... ... 18' 0" 



5. Coal (about) ... ... ... ... ... IQ' 0'' • 



All of No. 5 is not exposed. Further down the river it is ao-ain 

 met with dipping at the low angle of 6° to south-south-east. 



This coal is very accessible^ and might be easily worked^ and it 

 occurs in the neighbourhood of some rich ironstone of the Bardkars. 



An Agariah village has been established about half a mile south 

 of Potanga to work this ore. 



Ironstone shales group. — This group is best developed in the Jai- 

 nagar river, exhibiting its well known characteristics. Its northern 

 and southern boundaries are not at all well seen ; and between Tuksud 

 and Tarpa, I am not quite sure that the out-crop, as I have marked it 

 is correct. 



Near Pallo I saw a few carbonaceous shales and ironstones in a 

 stream (not noted on the map), which I presume are of the ironstone 

 group. As the section, however, is imperfect, it is very difficult to say, 

 with any degree of accuracy, whether these carbonaceous shales and 

 ironstones may not be a subordinate band of either the Raniganj or 

 Barakar groups. I have classed these beds with the ironstones, because 

 they occur where the continuation of the undoubted ironstones would 

 be found, if no intervening fault or faults displace them. 



West of Pallo, the Haniganj beds overlap, and entirely obscure the 

 ironstones. 



Raniganj group. — The beds of this group are spread under Baiia, 

 PaUo, and Riichap, and to the south of Sakul. 



There is nothing to remark about them of any local interest. 



( 329 ) 



