CHAPTER V. 



AURUNGA COAL FIELD. 



Stratigraphieal Details. 

 What has been stated on previous pages, when read with the aid of 

 the accompanying map, will probably be found sufficient to convey all 

 necessary information as to the general form and surroundings of this 

 field. There remain to be described, therefore, only the stratigraphieal 

 details of the several rock groups which are represented. 



The area of the field inclusive of outliers is exactly 97 square miles, 

 the different rock goups being exposed in the following proportions :— 



Mahadeva series 14"8 square miles. 



Panchet group 10'3 „ „ 



Eaiilganj „ 8-8 „ „ 



Barakar ,, 68*5 „ „ 



Talchir „ 4'5 „ ., 



97-0 



Section I. — Talchir Group. 



As has already been stated, rocks belonging to the Talchir group are 

 but sparingly represented in the Aurunga field. Except in the few in- 

 stances about to be noted, the Barakars, where the boundary is natural, 

 rest directly on the gneiss, having completely overlapped the Talchirs, 

 which, it is to be presumed however, occupy the central and deeper part 

 of the basin. 



Commencing examination on the east, the first deposit of rocks of 

 Talchirs south of Balu- t^^s age IS exposed south of the village of Balu- 

 ^^SS^^' naggar near the road-crossing of the Sukri. The 



section discloses a false-bedded Talchir conglomerate with some red 

 shales, the latter being perhaps of somewhat doubtful affinities. They 

 are immediately covered on the southern bank by typical Barakar grits 

 and pebble beds with white and pinkish clays. 



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