GEOLOGY. 95 



contact with the Metamorphics except perhaps to the west of 

 Kiraruma where a peak of metamorphic rock is shown. 



The thickness of the Talchirs has been estimated at 200 feet; 

 from the few exposures where accurate dips and width of outcrops 

 can be taken it is difficult to arrive at an estimate, but 200 feet is, 

 I think, far too small a figure. 



No actual contact of Talchirs and Barakars was seen, but in all 

 the cases where Talchirs were exposed in the 



Barakar Group. 



neighbourhood of Barakars, exposures of the 

 latter where observed were always found to be dipping in the same 

 direction and with practically the same amount of dip as the former. 

 The Barakars of this area have hitherto been treated in a very 

 general manner, so that a brief record of any well-defined divisions 

 and their distribution will be of use for the purposes of this paper. 

 Four well characterised divisions are noticeable. Beginning at the 

 top these are : — 



i° A series of brown -weathering flaggy ferruginous sand- 

 stones probably upwards of 100 feet thick, which appear 

 to form a transition series from Barakars to Kamthis. 

 2° A band of rather fine-grained sandstone of greyish color 



and about 40 feet thick. 

 3 The measures composing the greatest part of the thickness 

 of the Barakars, consisting of thin and flaggy sand- 

 stones finely laminated micaceous sandstone, carbona- 

 ceous and micaceous sandstone, carbonaceous shales 

 with thin coal bands interspersed and shaly coal-seams. 

 In this division it is remarkable that the argillaceous, 

 arenaceous and carbonaceous shales predominate in 

 the highest part ; that they are present in the same 

 proportion as the sandstones in the middle part, 

 and that the sandstones are largely predominant in 

 the lowest part. This feature very soon strikes one on 

 noting the sections exposed in the Lillari nala. The 

 record of the borehole put down during 1899 near 

 Dhoramuda shews the gradation very well. By dividing 



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