38 ball: geology of the rajmehal hills. 



trap and on the west by Dubrajpur sandstones. On the north, however, 

 instead of finding- the sandstones covered in a similar way, they are 

 found to terminate suddenly in contact with an inlier of gneiss which 

 occupies the whole of the apex of the valley, and upon which, in places, 

 the trap rests immediately without the intervention of any sedimentary 

 beds. 



An inferior coal is seen in the stream near Tesaphuli ; it is covered 



over by columnar basalt. This coal has been 

 Coal seam at Tesaphuli. 



worked rather more extensively than have the seams 



at most of the localities previously mentioned. 



In one of the old quarries the following section is obtained : — 



Felspathic sandstones ... ... ... 9' 10" 



Earthy carbonaceous shale ... ... ... 2' 



Inferior coal ... .„ ... ... 2' 8" 



Whether there is any coal underneath this cannot be ascertained with- 

 out re-excavation of the filled up portions, or by boring. Judging from 

 the remains where the coal was stacked, and making every allowance for 

 deterioration by weather, the conclusion arrived at is that the coal which 

 was extracted was of very poor quality. 



From this locality north of the river round to Telbhita the Barakars 

 are indistinctly seen, and their junction with the overlying Dubrajpiir 

 sandstones is extremely obscure. 



In the valleys south of the river, however, there are some very good 

 sections of the rocks which expose various beds of inferior coal and coaly 

 shale. 



The nearest of these to Dhamni is in the stream west of the village 



Section in Chukdum of Cnu kdum ; close to the village there is a seam 



stream. which has been opened up. At present from 



l'-3" to l'-6"of shaly coal only is seen. Proceeding south from this,, 



grits and sandstones, all more or less ferruginous, are met with on either 



( 192 ) 



