Ft.] 



[n. 



7 



6 



1 



4 



G 



8 



2 







4 







13 











7 



10 







1 



2 



15 







1 



6 



24 BOKAUO COAL-FIELD. 



26. Carbonaceous shale and reddish yellow micaceous siliceous sand- 

 stone 

 27- Coal ... 



28. Concretionary carbonaceous shale 



29. Purplish micaceous shale 

 80. Concretionary carbonaceous shale, portions containing ironstone ... 



31. Slightly carbo-arenaceous shales, with micaceous siliceous sandstones 



thin-bedded 



32. Coal 



33. Concretionary carbonaceous shales 



34. Coal ... 



Dyke running E. N, E. 



35. Grey micaceo-arenaceous sandstone 



36. Shaly Coal 



One hundred and thirty yards from this the highest bed of coal 

 in the river, comes the Koonar. 



None of the coal exposed in this section is very valuable, and indeed if 

 the quality were good, it occurs generally in bands of too small thickness 

 to render it useful. The first seam which was mentioned No. 1, measur- 

 ing 24 feet, is nearly all carbonaceous shale, and it was with difficulty 

 that I succeeded in igniting some pieces which I had collected in order 

 to make a fire. 



The conglomerates ■ are well developed in the tract between the 

 Montiko and Koonar, and in the latter river, there is a fine exhibition 

 of them. 



In the hilly country east of Gobinpoor, patches of Barakars are as 

 common as outliers of Talchirs, and the loose pebbles and pebble beds of 

 the former are often unexpectedly met with, whilst traversing the jungle. 



The difficulty experienced in mapping the small outliers of Talchirs 

 is equally felt with regard to these spreads of Barakars, but I have 

 indicated them as well as I can. 



Koonar Hiver, — The Koonar affords an excessively poor section 

 for the -first mile and a half of its course through the sedimentary rocks. 

 An indistinct outcrop of coal is occasionally observable, but the 

 whole section is imperfect. South of the mouth of the Montiko some 

 shales and sandstones appear, but it is not until we arrive east of the 

 Gobinpoor fault that coal is visible. The first seam measures 31 feet, 

 but this amount may be too much, as its outcrop is not very clear. 



( 62 ) 



