36 



GRIESBACH: EAMKOLA AND TATAPANI COAL-PIELDS. 



south-west^ some disturbances and faulting- are visible in the second 

 half of the Barakar section, which are not difficult to recognize. But the 

 Rauiganj and Panchet groups are much obscured by the covering of 

 alluvial deposits in all the gullies leading down from the Mahadeva hills. 



5. — Section along the nallaJis left and right of Banki River west of 



Chumra. 



This section presents considerable difficulties in comparing' it with 

 former ones, being much faulted, and certain beds have a peculiar local 

 development, others evidently have died out. But descending from the 

 Mahadeva sandstone which there has been denuded considerably, sloping- 

 gradually down to the level of the Banki valley, we find in descending 

 order, fig. 1, Plate IV : — 



I.— Pakchets 



II.— Raniganj 



III.— Baeakaes 

 ( 164 ) 



/ 21. For some distance no exposure ; after that, here and there 

 a friable felspathic sandstone grit and conglomerate 

 beds, probably of Panchet age. 

 '20. Ferruginous mottled sandstone, almost ironstone. 

 1 19. About 20 feet of sandstone. 



17. Red friable conchoidal shales, breaking up into small frag- 

 nients through extensive jointing, with intercalated bed 

 of yellow shales (about 20 feet). Top bed a white clay. 



f 16. About 50 feet thickness of shales, some very ferruginous, 

 alternating with clay shales and bands of ferruginous 

 nodules of spherical structure, containing the foUow- 

 i)ig fossils : 



Glossopteris angustifolia, Bgt. 

 „ indica, Bgt. 



„ communis, Fstm. 



These shales are jointed in several directions, and consequently 

 break up into small needle-shaped forms ; they are much 

 faulted and several times repeated. 

 Dip 10° south-west. 

 15. Sandstone 8'. 

 1^14. Shales 6'. 



13. Shaly coal, the base hidden below water ; dips under low 

 angle south-west. (16 of Bithiau section, p. 28). 



