Chap. IV. § 2.] lower damuda group. 53 



Above these lowest beds comes a series of grits and shales, inter- 

 , r . , . sected in every direction by traps, and so much 



Trap intrusions near J J l > 



mdl> hardened by them, that they form a raised ridge, 



on which stand the villages of Etiaptira, Amdia, Pahargora, Samdi, 

 Nauhath, &c. No coal is seen to occur in these beds, and if 

 any exist, it is, doubtless, too much hardened and injured by trap 

 to be workable. Some coal, however, is seen immediately beneath. 

 South of the ridge there are no sections of the Lower Damuda 

 rocks. 



These beds are tolerably exposed in the West branch of the Nunia. 

 The upper part of the section is not well seen, 



West branch of Nunia. 



but some are cut through towards the base. 

 The following beds are seen in descending order : — 



1. Sandy shale and sandstone of purplish-red and brown colors, 

 somewhat micaceous, and containing a few runs of ironstone. 



2. Coarse micaceous carbonaceous shale, with fossil plants. 



3. Coarse, dark -brown ferruginous sandstone, in beds of moderate 

 thickness, with some carbonaceous shale. 



4. Shale, with bands of hard grits. 



5. Black carbonaceous shale, with seams of sandy and impure 

 ironstone. 



6. Coarse, black shale, with imperfect plant remains. 



7. Hard massive bands of slightly ferruginous quartzose grits at 

 intervals. Intermediate beds not exposed. 



8. Reddish and yellowish sandstone. 



9. Massive, coarse, grey and yellow sandstone, with peculiarly joint- 

 ed (tesselated) ferruginous bands. Some beds of carbonaceous sandy 

 shale, with imperfect plant remains. 



10. Coal, about 2 feet thick, resting on about 3 inches of ferruginous 

 sandstone. 



11. Sandstone, hardened by trap. 



