64 TALCHEEB COAL FIELD. 



^'"'^- Angle of Dip. Direction of ditto. 



Sandstone, shaly below, ... 25° N. E. 



No section for 250 feet ; to these succeed rocks of the Upper Group 



Sandstones, ... ? ... ,,, jf g_ 



Coarse Conglomerates, ? ? 



Then the gneiss is brought up by the Konjiri and Bodabema fault. 

 The distances here mentioned, along which no section is seen, are 

 measured horizontally along the nullah, of course not always coinciding 

 with the direction of the dip. In one of these beds, there may perhaps 

 be a repetition of the phcenomena of the boulder bed. The total thick- 

 ness of the series of beds above the carbonaceous shales cannot fall short 

 of 2,000 feet, for underlying the above section (itself above 1,500 feet) is 

 a considerable thickness of beds not here mentioned, as they only crop 

 out at intervals, generally in the form of coarse sandstones not readily 

 distinguishable from those of the lower part of the series. If these all 

 rest conformably upon each other, as there seems every reason to 

 suppose they do, and are not repeated by faults, they must be from 400 

 to 500 feet in thickness. The rocks termed in the section ironstones 

 are highly ferruginous sandstones with a concretionary structure. 



These beds occupy a considerable area in the North-eastern portion 

 of the field, which they cover entirely, with the exception of some patches 

 of the upper grit, but it is impossible to determine the boundaries with 

 accuracy, owing to the similarity of the sandstones of the two series. 



Their Westerly limit is to the Northward the Ouli valley, while 

 further South they are overlapped by the beds of the " upper group." 

 The junction of the beds of this, the " upper " or Mahadewa group, 

 ,, with the underlying beds, is from the cause cited 



UpPEK OR MaBAX)EWA •' ° ' 



<^^°''^' extremely obscure, except in a few places, where a 



difference of mineral character allows an accurate division to be made. 



In almost all these cases, great unconformability exists, much more 

 than marks the junction of the lower and middle groups. 



