METAMORPHIC SERIES. 86 



east of Mooroop there is a small exposure of granitic gneiss withia the 

 limits of the Barakars. 



Near the villages of Bliidee and Ledupali gneiss occupies two small 

 areas within the boundary of the Talchir rocks. Reference to the map 

 will shew the position and relative importance of all these. 



In the valley of the Aurunga to the north-west of the Aurunga 



„ ,, ,. field the metamorphic rocks consist chiefly of 



Homblendic gneiss. _ •' 



hornblendic gneisses^ and in some cases, as in the 

 neighbourhood of Kedh and Bansdeeh, of hornblendic rocks with a 

 cannon ball structure which may be really intrusive diorite so far as any- 

 thing is certainly known to the contrary. In association with these 

 rocks occur all the principal deposits of magnetite as at Lunkah, 

 Rajhera, &c. These will be fully described in the economic chapter. 



In the Maila river section, half a mile east of Satbarwah, there is an 

 exposure of a considerable thickness of limestone, 



bamah.'^"'' "^^'' ^^*- and calcareous gneisses. They do not appear to be 

 nearly so pure or clean as those in the Toree 



parganah above described. A fair average sample yielded to Mr. Mallet 



the following percentage composition : — 



Carbonate of lime . 60*8 



„ magnesia 16"0 



Alnmina and oxide of iron 5'0 



Insoluble . 182 



100-0 



This would be a very indifferent flux for iron-smelting, but it is possi- 

 ble some portions may prove to be of better quality. 



The hilly ground on both sides of the Koel above its junction with 

 the Aurunga, and thence, up to and beyond Daltonganj, consists of similar 

 rocks, with which granitic varieties are occasionally interpolated. This 

 region has not yet been thoroughly explored ; but so far as is at present 

 known, the only sedimentary rocks found there occur as a cap of arkose 

 grit, which forms the plateau of the Chongah hill station. 



( 35 ) 



