NAZIRA HELD. 61 



The saddle north of Kongan H. S. is covered with surface clay, by 

 which the rocks are obscured, but in the Bor jan and its feeders, in the 

 Dikhu, and various of its lateral nallas, and in the streams below Namsano*, 

 numerous sections are obtainable. The measures here rise to a consider- 

 able elevation, seams of coal having* been observed on the Naginimora- 

 Kongan path and below Namsang at altitudes above the plain of 1,700 

 and 2,000 feet, respectively. 



Pieces of coal are washed down the stream which drains the valley 

 between Namsang and Nangta, but in the Sanga jan the Disang and 

 Tip am groups are in contact. 



Besides the above known coal-field, it is highly probable that the 



measures occur to the north of the Sub- Himalayan 

 Probable coal beneath i i • 



the alluvium to the rocks : that IS to say, that the Jaipur band is 



continuous towards the west below the alluvium, 

 and that coal might, therefore, be struck by borings at a certain distance 

 from the foot of the hills west of the Taukak. But the thickness of the 

 alluvium is entirely unknown. Unless the coal were found at a com- 

 paratively trifling depth, the advantage of its greater proximity to the 

 Brahmaputra would not outweigh, or even balance, its unfavorable place- 

 ment, in comparison to the Dikhu valley coal, for mining operations. 



Coal outcrops. — In the first nalla after crossing the Saffrai, by the 

 Near mouth of Chota P^*^ ^^'^^ Charaido to Lakma, several outcrops 

 '^^''^^^- are visible. The highest of these has the follow- 



ing section : — 



Brown shale, seen 



Coal ... ... 



Carbonaceous and brown shale 



Coal 



Brown and carbonaceous shale 



Brown shale ... ... ... ,,. ... 6 



Ft. 



In. 



Ft. In. 

 9 



1 



7 





1 



8 









5 





2 









2 









( 329 ) 



