42 MALLET: COAL-FIELDS OF THE NAGA HILLS. 



Namdang south of ^^ *^^ mouth of a small lateral nalla joining 

 Eangring. ^^g eastern branch of the Namdang south of Ran- 



gring* the following section is exposed. 



Shaly sandstone, seen 



Brownish-^ey shale 



Coal 



Brownish-grey shale 



Coal ... ... 



Brownish-grey shale 



Coal 



Brownish-grey shale 



Coal 



Blank 



Coal 



Brownish-grey shale ... ... 



Coal, seen 



Total visible thickness of coal 



„ yf 9) „ snaie . . . 



Blank 



Total visible thickness of seam ... ... 106 6 



Dip, east at 50°; coal hard. The seam can be traced for some 300 

 yards up stream, having, a little beyond the above section, a south-western 

 strike and vertical dip. 



Owing to the thickness of this seam and the circumstances 

 of its position, a greater quantity of coal appears to be within reach 

 by open workings than in any other locality in the field that I 

 have seen. 



Some three hundred yards below the junction of the branches of 



Lower down in Namdang, the Namdang, a thin seam exists, having a section 



as follows : — 



Ft, In. Ft. In. 



Brownish-grey shale, seen ... ... ... 9 



Coal, dipping east 20° south at 50° ... ... 2 



Earthy sandstone, seen ... .. .. ... 1 6 



* In the Namdang about here there are some large loose blocks of a highly vesicular 

 dark -grey slag, which has probably been formed during the combustion of some coal seam 

 at the outcrop. 



( 310 ) 



Ft. 



In. 



Ft. 



In. 





•.. 



8 









... 



1 



6 



4 











2 



6 







4 











5 



6 







18 











11 











21 











8 











13 











4 



6 







15 











75 









23 



6 







8 











