THE TAWA FIELD. 41 



Barakars. I have, therefore, preferred to colour the whole as Barakars 



? -• 

 on the supposition that the boulders have been washed out of the 



Talchirs further up the river and carried down to be redeposited on the 



surface. 



The whole northern boundary is formed by, the Motur rocks, which 

 appear to overlap along parts of the line, though, as a rule, the passage 

 from Barakars to Moturs is very gradual, and massive sandstones which 

 may belong to either group intervene between the typical Barakars 

 and the red cla^s. The Motur rocks pass along to the west and form 

 the entire western boundary. The south boundary is formed by the 

 Talchirs, and at the east end it is faulted. 



XXII. — In the Tamia river, which runs into the Tawa close by 

 Outcrop of coal in the village of Chomou (E. Lon. 7^24'), there is 

 Tamia nver. a seam f coa ] w hich was discovered and reported 



on by Major Ashburner in 1866. 



The seam is situated in the bed of the river nearly opposite and 

 to the east of the small village of Tanse (E. Lon. j8°24'). Going up 

 the stream the seam is first seen on the left bank, close to a small 

 quartz vein which runs nearly north-east and south-west. Next to the 

 reef there is a small thickness of sandstone much impregnated with 

 silica, against this some shale rests abruptly, dipping to the east 

 and overlying the coal, of which only a few inches are seen here. 

 A few yards further up the river on the right bank five feet of coal 

 are exposed. By means of a small excavation I was able to obtain 

 the following section, but owing to influx of water I was unable to 

 sink through the coal. 



Ft. In. 



Surface soil ......... 12 o 



Coal 50 



Carbonaceous shale . . . , , 1 Q 



Coal. 20 



Carbonaceous shale with pyrites - . . . . 04 



Coal, over •••....,. 06 



21 4 



or over q\ feet of coal. 



Owing to the surface soil resting'on the coal and the difficulty of 



( 41 ) 



