KHASI HILLS. 



133 



the beds of gneissose slate. (Fig. 9.) The lower beds here are con- 



Fi;^. 9 



glomeratic, occasionally coarse ; large rounded pebbles of quartz, aud 

 also of the hard gritty gneissose beds below, being imbedded in a fine 

 sandstone. This character changes to a fine gritty sandstone, formed of 

 sharply angular pebbles of quartz in regular layers. Intercalated with 

 these, are some slaty beds very irregularly developed, occasionally 

 carbonaceous, dark-coloured, and micaceous ; occasionally light-coloured, 

 compact and earthy. Deep ferruginous stains are frequent, and the 

 rocks have often, in consequence, a very variegated tint. The beds here 

 are perfectly horizontal. 



The country between Nonkradem and Joowai, I had no opportunity of 

 visiting. The same sandstones, which I have been describing, evidently 

 continue across ; cut into, and denuded by the deep river gorges, in which 

 the other and older rocks are exposed. And the same rocks appear also 

 to continue further to the East from Lakadong. 



