PART 2 .] 
Ball: Bismmpwr Coal-field. 
33 
In the long south-to-nortli reach which follows, the lower portion of a seam is exposed, 
paving the bed of the river for about two miles. A clear section 
beam. , t 
oi tlie top or tins seam is exposed near Bhagara. 
Seam — Descending. 
Sandstone, about ... ... ... ... ... ... 12 ' 
1. Blue shale ... ... ... ... ... ... ? 
2. Coal, portions shaly, but for the most part fair ... ... ... 4' 
3 Blue shale ... ... ... ... ... ... Q" 
4. Coal, fair, upper 3" stony ... ... ... ... * ... i' i" 
6 . Shale ... ... ... ... ... ... * ... V 4" 
6 . Coal like No 4 ... ... ... ... ... ... 3 " 
7. Shale ... ... ... ... ... ... .. 8 " 
8. Coal like No. 4 ... ... ... ... ... : ... 3 " 
9. Blue shale, about ... ... ... ... ... ... V 8" 
10. Carbonaceous shale ... ... ... ... ... 3 " 
11. Coal like No. 4 ... ... ... ... ... ... ? 
12. Shale,—covered. 
Some experiments with No. 4 showed that it does not coke, but retains its shaly shape. 
On roasting, it evolved gas freely in quantity, see p. 39. 
The east-to-west reach beyond this has a deep channel, which retains a considerable 
body of water. This and a dense grass and tree jungle which clothes the sides render it 
almost impossible to keep the river in sight. 
At the bend to the next reach there is a seam which is possibly only another outcrop of 
geam the one just described at Bhagara. However, it contains less coal, 
and the constituent layers of coal and shale do not correspond. 
Section — Descending. 
Felspathic grit sandstone. 
Interval. 
1. Blue shale 
2. Coaly „ 
3. Blue „ 
4. Coaly „ 
5. Coal, fair 
6. Blue shale 
7. Coaly shale 
8. Coarse grey and blue shales ... 
9. Coaly carbonaceous shale 
10. Shale. 
Base covered. 
1 ' 
V 3" 
V 4" 
4" 
2 ' 2 " 
3' 
V 2" 
2’ 4" 
1 ' 
From this northwards to its junction with the Banki (Pertabpur) river, the Mahan 
Traj) exposes sandstones at intervals; east of Durti a fine trap dyke 
causes a fall in the river. The strike of this dyke in the bed of 
the river is 15° north of east to 15° south of west. A possible continuation of it is seen 
in the Johoa, six miles to the west; but in the intervening country and also to the east of the 
river I could see no trace of it. 
Beyond the junction with the Banki, under the eastern bank, there is a small seam 
geam which contains some hard coaly shale, hut apparently no coal. 
After this for nearly a mile there are Barakar sandstones ; and then 
no rocks are seen for nearly a mile, the deep channel of the river being filled with water. 
The first rocks exposed are some Talehir boulder beds, which crop out from underneath the 
western bank.* The faulted junction is therefore hidden here, hut is very plain In sections 
both on the east and west. North of. this the Malian does not again traverse Barakar rocks. 
Taking up the tributaries of the Mahan, in regular succession from east to west, the 
first to be noticed is the Dekia. 
