74- mallet: coal-fields op the naga hills. 



These figures, then, indicate an available band measuring- 44 X 1,760 x 

 150 X 17 cubic yards, containing about 20 million tons of available 

 coal in site, or say 10 million tons of marketable coal. 



As the easiest means of transport for the coal at the iead of the 



Tiru would probably be via the Dikhu valley. 

 Tiru and Dikhu. • , i -, , 



it should be grouped with the coal in the latter 



rather than with that in the Saifrai. The following thicknesses of coal 



are known to exist : — 



» 

 In Tiru 



„ Bor jan 



„ Wakangjan 

 Vicinity of Dikliu ... 

 Below Namsang ... ... 



Average 



or about 6 yards. As the measures are considerably elevated above the 

 plains, and adit workings could not unfrequently be resorted to, the 

 coal for a breadth of 200 yards may be considered as profitably within 

 reach. The distance from the Tiru to north-west of Namsang being 

 seven miles, we have, according to these figures, an available band con- 

 taining 7 X 1,760 X 200 X 6 cubic yards, or nearly 15 million tons of 

 coal in situ, equivalent to say half that amount of marketable coal. 



In the above estimate no account has been taken of the possible 

 extension of the field, at a workable depth below the alluvium, north of 

 the Chota Taukak, nor of the Chingan ridge, where the coal measures 

 have not been actually proved to exist, nor of the portion of the field 

 north of Nangta, where, although coal is known to occur, no workable 

 seams are on record. 



Ft. 



In 



. 15 







. 25 



9 



. 32 



7 



4 







. 16 10 



. 18 10 



( 342 ) 



