78 ball: geology of aubunga and hutae coal fields. 



They are not likely to include a workable thickness of coal, but 



„ , t , J- should it ever be desired to test them, a boring or 



Seams probably of no •> o 



value. trial pit west of the village of Gowa would prove 



their quality. 



In the Ghotwa river some thin carbonaceous shales occur, resting 

 immediately on a narrow marginal zone of Talchirs. 



At Hurkha there is a local development of ironstones of no great 

 extent. 



The bed o£ the Aurunga up to Dhudwa is frequently traversed by 



the boundary. In several cases the lowest beds 

 Section in Anrunga. , . , i i m i i • 



are yellowish sandstones, apparently Talchirs. 



The sections of Barakar sandstones oflFer no particular points for note, 



save that anticlinal and synclinal rolls are very abundant. The map 



will serve to explain the nature of the faulted junction, shewing how 



the Mahadevas have been let down into contact with the three older 



groups respectively at different points along the line. 



In the neighbourhood of Latiahar and thence westward the Panchet 



and Raniganj groups have disappeared, and the 

 Barakars at, and west . . o i •« i • • i 



of, Latiahar diminished thickness now existing of the Barakars is certainly 



in thickness. , -, . , • ii j. tt r ±^ • ' 



very much less than m the. east. How tar this is 

 to be attributed to original limitation of deposit, how far to subsequent 

 denudation, it is not easy to say. It is quite probable that the upper 

 groups never were deposited so far west; and, on the other hand, it seems not 

 unlikely that some portion of the Barakar sequence has been denuded 

 away, though it may be difficult to prove the same. Be this as it may, it 

 is certain that an outlier of Mahadevas rests directly on sandstones and 

 conglomerates, whose lithological characters resemble those of the rocks 

 forming the lowest zone in the east of the field. The Barakar rocks 

 near Latiahar, so far as they are seen, shew signs of considerable disturb- 

 ance, due no doubt to the proximity of three lines of fracture, viz., 

 a pair of east and west faults, and a cross-fault which bounds the field 

 up to Putkee, 



( 78 ) 



