16 ball: geology op aurunga and hutae coal eields. 



capped by any of the above-mentioned move recent formations, the 



outlines presented by these crystalline hills are 



Hills of crystalline generally sharply angular, but some of the ridges 



are flat-topped and continuous at pretty steady 



elevations for long distances. 



2nd, — The hills of this class are exclusively formed of one or other 

 of two of the subdivisions of the Gondwana 



Hills of sandstones, &C. ■ n ^ -\ir ^ -\ -r ^ i 



sequence, viz., Barakars or Mahadevas. In the 



Aurunga field the Barakars never rise to form an eminence worthy of 



the title of hill ; but in the Hutar field, east of the 

 Barakar hills. 



Koel river, they form long ranges averagmg from 



250 to 300 feet above the surrounding country, occasionally having peaks 

 which rise about 300 feet higher. This occurrence of Barakars as hill- 

 formers is unusual and will be again alluded to further on. 



Rocks of Mahadeva age occur as hill-formers not only in the Aurunga 

 and Hutar fields, but also in the Karanpura and 

 Tatapani fields. The structural and lithological 

 characters in each case present the closest and most striking points of 

 resemblance. In the Aurunga field there are three distinct groups of 

 these hills, which are situated respectively in the neighbourhoods of the 

 villages of Subano, Jugguldugga and Latiahar. Besides which there are 

 two small outlying hills at Sasung and at Chulta west of Latiahar. 

 These groups consist, for the most part, of flat-topped ridges from 200 to 

 30O feet above the level of the surrounding country, and have their 

 faces scarped and often eroded into grotesque shapes. Occasionally, 

 where the beds have been tilted, conical pealJs rising considerably above 

 the general level of the ridges have been formed, as, for example, the 

 Chiharo peak near Subano, and the Latiahar peak near the village of the 

 same name. The latter hill according to the map is 910 feet high, or 

 2,051 feet above the level of the sea. 



In the Hutar field there are similar flat-topped ridges with scarped 

 and eroded faces. In this area the Bijka hill is the most prominent 

 peak, being 1,300 feet above the village of the same name, or 2,479 feet 

 { 16 ) 



