ECONOMIC GEOLOGY. 



Chapter VI. — Coal — Graphite. 



Coal. 

 I have mentioned all the coal out-crops as yet found, when describing 

 ~ . . . . the Damudas, but it may be well to give here a 



Principal known out- ' J & 



cro P s - list of the more important ones, or excluding those 



under 2 feet thick. Proceeding from east to west, we have — 



Thickness of coal * 



at out-crop. *. 



Ft. In. Dip. 



Rakti naddi ... ... ... 2 6 70° 



Ditto ... ... ... ... 5 6 70° 



Ditto (part of thickness concealed) seen ... 1 4 70° 



Chirankhola naddi ... ... 5' 4" to 7 55° 



Ditto ... ... 2' 0" to 8 



Pagdandi, south-east of Selim Hill ... ... 2 



Cart road ... ... ... ... 3 6 40° 



Ditto ... ... ... ... 2 



Ditto ... ... ... 1' 0" to 3 6 30° 



Ditto ... ... ... ... 3 6 45° 



Ditto ... ... ... 2' 6" to 3 6 45° 



Ditto ... ... ... ... 6 30° 



Ditto ... ... ... ... 2 6 35° 



Tindharia ravine ... ... ... 11 o 80° 



Ditto ... ... ... 6 



Mahanaddi river (part of thickness concealed) seen 4 70° 



Riyem naddi ... ... ... 3 6 70° 



Rumtek naddi ... ... ... 7 o 20° 



Ditto ... ... ... 2 70° 



Ranjang naddi ... ... ... 3 q 150 



I have spoken of the above as out-crops, not as seams, because the 

 vegetable mould and clay beneath the dense jungle render it impossible 

 to trace the seams for any distance. They are seldom visible except in 

 the very beds of the streams, nor can a seam be recognised in a second 

 out-crop with any certainty on account of its rapid variations in dip and 



( si ) 



