CHANDA DISTRICT. 29 



The Kamthis overlap the Barakars in several places, which might 

 be considered a proof of the upheaval and denudation of the Barakars, 

 but this overlapping may be the natural result of depression during 

 deposition. 



The attenuation of the coal on the west edge of the Warora basin 

 may suggest original limitation ; but I see no reason why an advocate of 

 post-Barakar denudation should not quote the circumstance as evi- 

 dence in favour of his view, and perhaps with some show of reason, for 

 if we compare the sections P. SI and Ml, which are all close to one 

 another, a decrease from 34' 10" of coal to 12' 9" would be a most sudden 

 and unusual tailing off.* 



Some of the Warora bore-holes are quite outside the thick seam, as 



for instance, the one between the school and the 

 Warora bore-holes. 



town, which, starting in Kamthis, went down 249 



feet without striking coal. This is only 800 yards from No. VI., in 



which coal was proved at 69 feet (surface level nearly the same). 



In D., that is only 200 yards to the rise of VI., the coal was also missed. 

 K., which is to the rise of P. (coal at 96' 0") was sunk 123' &" but no 

 coal found (surface level of K., lower than P.). J. is also outside the 

 coal, and likewise M. 



All this evidence proves how rapidly and abruptly the coal disappears. 

 And whether due to original attenuation, or to denudation, it shows 

 that unconformity of overlap exists between the coal-measures and the 

 Kamthis. And it follows as a consequence of this relationship, that the 

 existence of representatives of the upper series of rocks is not always 

 proof of the existence of the lower, underneath. 



* It is just possible, in explanation of tbis great contrast, tbat tbe bore-boles along tbe 

 western edge of tbe basin were not carried to tbe bottom of tbe seam. I bave not tbe 

 journals of tbe earlier borings, and take my figures from tbe plan of tbe bore-boles furnish- 

 ed me by Mr. Ness. The journals of Bl to Wl have been supplied. 



( 39 ) 



