NERBTJDDA DISTRICT. 181 



1 foot Coal, vailing from 10 to 14 inches in thickness, about 10 



yards of outcrop seen, within which it varies so greatly in qua- 

 lity as to be frequently only a carbonaceous shale. 



2 feet Sandstone with carbonaceous layer, nodules of pyrites. 



3 „ Black shale. 



4 „ Sandstone, hard, red and with many nodules of pyrites. 



1 foot 6 inches, black shale with many carbonized plant impressions. 



Thick bedded sandstones. 



In none of the previously mentioned localities is there any difficulty in 



separating those beds characterized by the upper 

 Remarks on section, 



Damuda plants from those on which they rest, and 



Compared with other fr0m th ° Se which 0Verlie them « In the Mahanudi 

 sections. valley their boundary below is well marked, and 



the Lameta beds which there rest on them are so contrasted in lithologi- 

 cal character, that although no visible unconformity exists (both beino* 

 quite horizontal) they cannot be confounded together. At Jubbulpore 

 the same remark holds good. And in the Sher section although the 

 great sandstone beds which cover the shales may turn out to be the rem- 

 nants of the Mahadevas, yet so (comparatively) little of them is seen, that 

 it is immaterial in that place to settle the question positively. 



In the Hurd section it is far otherwise, the plant bearing beds are laid 



bare in the bottom of a deep narrow glen, above 

 Unconformity not tra- , . 



ceable in this Hurd sec- them the great sandstone and conglomerate of the 



Mahadevas rise in steep, (often vertically scarped) 

 high hills, immense fallen masses from which crowd the gorge, so as to 

 hide or obscure the section in most places. The thick sandstone beds 

 which underlie these Mahadeva rocks, interstratify with, and cover the 

 plant bearing shales, are lithologically similar to the Mahadevas them- 

 selves, and it has been found impossible to separate them from these. 

 Still certain considerations would seem to suggest that there may be a 

 slight unconformity between the beds forming the hill sides, and those 



