AUllUNGA FTELD : BARAKAR OROtJP. 61 



In the neighbourhood of Kolherwan occurs the above-alluded to zone 



r . X T^ iv of shales and ironstones. The latter aredissemi- 



Ironstones at Kolher- 

 wan. nated rather sparsely in beds 2 to 3 inches thick, 



throug-h perhaps 30 feet of grey sandy shales which rest on blue 

 concretionary shales. Such is the section seen south of fatratu beyond 

 which the extension is obscure, possibly the ironstones die out. At 

 Lejang there are ripple-marked sandstones forming a small hill, dip 20" 

 S.-W. Throughout a considerable portion of this neighbourhood, con- 

 cretionary nodules of iron, weathered out from the sandstones and grits, 

 strew the surface in great abundance. 



In the southern branch of the Sukri* at Pukraf, the junction of the 

 Internal overlap of I^aniganjes with the Barakars appears to indicate 

 Raniganjes. internal overlap in the former. In the north ta 



south reach near the village the yellow sandstones dip steadily south at 

 angles rising to 40°. Suddenly then at the village there is a roll which 

 brings up Barakar sandstones with carbonaceous shale, the" base of which 

 is slightly coaly. There is no sign of any faulting, and the peculiarity 

 of the section seems to be due to the topmost beds of the yellow 

 (Raniganj) sandstone overlapping all below, thus resting directly on the 

 Barakars. About half a mile east of Pukrar the section discloses some 



light-coloured sandstones and shaly beds, which are, 

 Baniganj outlier. 



I think, referable to the Raniganj group ', they rest 



detached in a distinct synclinal of Barakar beds, and therefore constitute 



an out-lier. Proceeding eastwards, grits and sandstones with dip of 5° are 



underlaid by shales with poorly developed ironstone, which may possibly 



represent the Kolherwan zone. In the next reach south-west of Lejang, 



we meet the following section :— 



Section, descending!, dip W. and W.-S.-W. 



Grit 4' 6" 



Grey shales 4' (/' 



8' 6" 



» Whether there exist distinctive names for all the different streams which combine 

 to form the Sukri I cannot say ; it is most probable that there are, but the guides with me 

 certainly applied the name Sukri both to the one south of Balu-naggar and that under 

 description, 



( 63 ) 



