44 BALL : GEOLOGY OP AUEUNGA AND HUTAB, COAL FIELDS. 



exclusively of rounded or angular white qiaartz pebbles, as is commonly 

 the case with normal Barakars. Associated with them there are green, 

 somewhat clunchy, clays, and occasionally soft yellowish sandstones. 

 This group is overlaid by Mahadevas, which are precisely similar in 

 lithological and structural characters to the rocks of the same age in 

 the Aurunga and Karanpura fields. How far the superposition by 

 these Mahadevas is strictly conformable, it is difficult to say ; but that 

 the thickness overlaid varies very considerably in difierent places is 

 sufficiently obvious, as will be seen by reference to the map. 



From their position the rocks of this zone might be taken to 

 represent the E-aniganj group, but the lithological characters of the 

 grits and conglomerates are a bar in the way of this supposition, normal 

 Raniganj rocks being strongly characterised by the fineness and 

 uniformity of their texture. To the grits which occasionally occur in 

 the Panchets (Lower Panchets of old classification), they present a 

 certain but not sufficiently close resemblance for satisfactory correlation. 

 The alternative left is to regard them as a local 

 Sub-group of Barakars with special characters. In 

 favour of the adoption of this view, there is the fact that irregularities 

 produced by thinning out being excepted, they rest with perfect 

 uniformity on the beds of the lower zone, and that a few cases were 

 met with where green elunchy beds appeared to occupy a position 

 within the limits of the lower zone, thus preceding, and as it were 

 anticipating, the coming more general change. 



In the Tatapani field west of the Kunhur, so far as my brief 

 examination of it enabled me to form an opinion, 

 similar rocks occupy the position of the intermedi- 

 ate sandstone and conglomerate zone which has there died out, and rest 

 directly on a thin bottom zone of sandstones, carbonaceous shales and coal. 



On the map the limits of this sub-group in that portion of the 

 Hutar field which lies west of the Koel is indicated by a dotted line. 

 I have not thought it to be advisable to distinguish it by a separate 

 colour at present. 

 ( 44 ) 



