Pakt 4 .] Ball: Raigur and Hengir Coal-field: (Gangpur). 
103 
Mr. Medlicott found Talehirs all along the southern boundary of this area striking north¬ 
west from Sumbulpur, but 1 had no time to connect these with my work. 
Barak aks. 
The Damuda rooks occurring in this area probably belong to the Barakar group. For 
the most part they rest immediately on the gneiss, aud are covered and overlapped by the 
upper sandstones and grits so completely that but for the denuding action of rivers they 
would now be altogether concealed. This is more particularly the case in the eastern portion 
of the area where the best coal seams occur. Thus, iii the Baisandar and Jhajia rivers the 
Barakars are merely exposed in the beds, while the upper rocks compose the opposing banks. 
It will be more convenient to describe the sections from east to west; I therefore 
commence with that of the Baisandar river. 
In the bed of the Baisandar, the most eastern outcrops of Barakars occur south of 
Kosira. From this point the northern boundary of the field can be most distinctly traced 
through the southern tolah of Tikripara; the south-eastern boundary is less distinct, but I am 
inclined to believe that a strip of Barakars, bounded by the gneiss on the east and by the 
upper sandstones on the west, occurs at least as far south as the village of Baliuga. 
The section of the Baisandar for about a mile west of Kosira discloses ordinary Barakar 
sandstones and the arkose bed above alluded to; this consists of granitic and schistose materials 
not showing any sign of having been subject to weathering. Beyond these rocks there is a 
succession of rolling seams of carbonaceous shale with occasional bands of coal; these strike 
with the boundary, but as they are all nearly horizontal, constant repetitions occur in succeeding 
streams, and I had not time to trace out the section in sufficient detail to enable me to affirm 
positively how many distinct seams exist. The first piromising seam which I measured occurs 
250 yards south of the Jhapurnga and Tikripara road crossing. The following is the section:— 
Descending: dip 15° to 30° south of eust. 
Ft. In. 
Sandstones. 
1 . 
Blue shales 
3 4 
2. 
Coal 
... 4 7 
3. 
Irregular mass of blue shale ... 
2 6 
4. 
Coal, upper portion shaly ... ... 
3 10 
5. 
Parting ... 
0 2 
7- 
Coal, about 
5 0 
Several feet below not well seen. 
The coal in this seam at first sight looked very promising, but on analysis it has proved 
to he of inferior quality, the proportion of ash being 306. I very much fear that there is 
at present no promise of coal of better quality and of workable thickness being found in this 
neighbourhood. Below is a seam of 80 feet of carbonaceous shale with portions coaly. This 
could not be measured without excavations being made, for which there was no time. But it 
gives no promise of containing a workable thickness of coal. 
The reaches above this expjose the top of a fine seam of carbonaceous shales with coaly 
bands. The strike being with the stream, a very peculiar terraced appearance is produced. 
Above its junction with the Jhajia the course of the Baisandar is from north to south, and 
thus a very distinct section is obtained of one of the largest seams which has been recorded as 
occurring anywhere. 
It is most unfortunately deficient in workable thicknesses of good coal. The following 
is the section :— 
Ascending. 
Ft. In. 
1. Coarse grit sandstones with interpolated carb. shales ... 0 0 
2. Blue and sandy shale ... ... ... ... 2 o 
*3. Inferior coal with partings of carb. shales, central portion all coal G 10 
8 10 
Carried forward 
