GRIESBACH : BAMKOLA AND TATAPANI COAL-EIELDS. 



The triangular-shaped hill range north of Tatapani is composed of 

 metamorphic schist, chiefly mica schist, and the boundary of the Talchirs 

 skirts this hill along the western escarpment, the Talchirs dipping away 

 from it. 



1. — Section along the nullah north of Bithiau. 

 In all the nullahs north of Bithiau (deserted village) we observe the 

 following section in descending order, fig. 1, Plate III — ground between 

 the Sendur river and the Metamorphics : 



D. — Ieon Shales 



C- Barakabs 



B.— Talchirs 



17. 

 16. 

 15. 

 14. 

 13. 

 12. 

 11. 

 10. 



9. 



8, 



7. 



6. 



5. 



4. 



3. 



2. 



1. 



Clay shales alternating with thin leafy iron shales. 



Coal-seam 5.' 



Shales alternating with thin-bedded sandstone. 



Coal-seam 1.' 



Shales, carbonaceous. 



Coal-seam 6." 



Sandstone with bituminous shales alternating. 



Coal-seam 2'. 



Bituminous shales. 



Coal-seam 10" passing into — 



Thin bed of sandstone. 



Clay shales, dark, with traces of fossil leaves. 



Coal-seam of 1' thickness. 



Shales, cai'bonaceous. 



Thin coal-seam passing into — 



Shales, micaceous and grey. 



Sandstone, fine-grained ochre-coloured. 



Boulder-bed. 



Sandstone, bright olive-coloured, irregular bed and 

 thinning out. 



Shales of same character as bed 1. 



Sandstone. 



Pebble conglomerate. 



Thick-bedded sandstones. 



Talchir boulder-bed of typical character. 



Sandstone, whitish-yellow, with bands of pebbles. 



Shales, reddish-brown and olive-coloured, traversed by 

 jointing in three or more directions, thereby separat- 

 ing into small cubes and long needle-shaped forms. 

 Here and there gritty, with scattered boulders of 

 metamorphic rocks. 



-Metamorphic schists. 

 ( .156 ) 



