SEC. 3.] RUNN-ISLAND KANGE FKOM PUTCHUM TO CHOEAE. 113 



some syenitie pebbles^ indicating an unconformity between the Jurassic 

 formation and the (probably next underlying) metamorphic rocks. 

 Above these are some coarse, pale yellow and brownish sandstones with 

 quartzose layers^ succeeded and covered up by the sub-uummulitic 

 group. 



On the northern side of the Neelua hills the broken spurs from 

 the cliflFs sometimes show the northerly steep inclinations of the 

 anticlinal, complicated by local contortions. 



On this side of the range^ northward from the town of Bfla, at 

 a considerable elevation, the rocks are partially 



Peculiar mounds of sand. ,i, . , i n tti t 



concealed by singular mounds or sand-like dis- 

 integrated or unconsolidated sub-recent concrete. This is very local and 

 in places quite incoherent, but some portions possessing the ordinary 

 concreted character also occur at the same place, patches of the latter 

 resting on the surfaces of highly inclined Jurassic beds, the stratification 

 of the sub-recent rock abutting against the sloping surface on which 

 it was deposited. 



This sub-recent concrete occurs in many places in the glens of the 

 island range under description ; it is always irregular and inconstant^ 

 so recent-looking that it might even now be in process of formation. 

 This actual formation has never been observed, while evidence is con- 

 stantly aiforded of its destruction by atmospheric forces, and its modern 

 age is established by its containing calcined human bones at a cinera- 

 rium near Bela. 



At a place called Dourawa to the westward of the town of Bela, 

 T , ... i a stream course exposes the iunction between the 



Latentic group at i j 



Dourawa. jurassic and sub-nummulitic rocks. The aspect 



of the locality is peculiar, the broken ground and steep hillocks between 

 ravines covered with laterite debris, having the most brilliantly contrasted 

 tints of purple, bright red and rusty orange associated with intense 



( 113 ) 



