256 MIDNAPOUE, ORISSA, &C. 



very massive but continues to the west, associated witii the hornbleiulic 



rocks. It occurs in great rounded bosses which have a marked cliarac- 



ter and curiously spotted aspect from the darker imbedded crystals. 



Highly felspathic and rapidly decomposing gneiss is associated, and 



some beds of hard quartzose granular rocks. 



The same prevailing hornblendic character of the rocks, some of the 



masses or beds having even a dialiagic character, continues southwards 



to the small hills of Kora, or Koro. This hill is sharply scarped to the 



north and west, and, on those sides, stands up 

 Koro hill. , , •■, p , n 



boldly from the flat country around ; but on the 



east it descends gradually into the general level. It is composed entirely 

 of a granular quartzite t)f light greyish-white colour arranged in flaky, or 

 flag-like, masses or layers, more like a thin-bedded indurated sand- 

 stone, than ordinary gneiss. These flaky layers are nearly vertical, 

 underlying about 10° to the north. The rock is in thin layers not more 

 than a few inches thick, all adherent but very easily detached. 



There is a marked jointing, which is vertical and heads nearly due 

 north and south. In addition to the foliation or 

 lamination of the layers in the mass, there is also, 

 although not very distinctly seen, a kind of curved parting or division 

 in the rock corresponding rudely with the outer surface, and giving a 

 curiously rounded, though by no means polished, look to the top of the 

 bosses. This is precisely analogous to the curved lines of division or 

 partings, which are so frequently seen in the more granitoid masses of 

 gneiss through this country. 



This small hill of Koro is exactly in the same line as the more marked 

 rise of Susinia to the vvest in Puralia ; and it may not improbably be 

 connected with some line of faulting or disturbance, which may be 



traceable when the country to the west is examin- 



Probable fault. i i i • i t 



ed. There is a marked change in tlie du-ection 



of the rocks north and south of this line, which seems to confirm such a 



