'11 1 10 K UK ASIA (XMLFIKIJ). 
200 
Ort comparing tlio two sets of figures it at onco becomes evident 
that in horizon i wo have a group of seams of sufficient thicskness 
. ^ and high enough ((uality to deserve very 
careful investigation. In fact, it will be noticed 
that in most of the cases where the observed thickness of coal 
is small the full thickness was not exposed, and it seems likely 
that a minimum average thickness of 5 feet of coal may he 
expected. The map indicates the possible extension of this scatn 
over at least 4 scpiare miles in the Kurasia area. And, as has 
already been noticed (see p. 191), every square mile of coal of 
this thickness means a quantity of 5| million tons. 
Horizon 3 also looks very promising at Bijaura Jharia, where 
. _ 11 1 feet of coal broken into two portions by 4 
feet of obscured ground allows a possibility of 
15| feet of coal. This thickness, however, decreases to only 4'3" in 
a tributary a short distance away. 
The 8 foot seam of Gorghela Nala taken as horizon 2 has 
not been detected elsewhere, but in view of 
liollZOll 2. . 1-, , 1 -rr ^ 
its good quauty (see analyses K. 25, K. 26, 
Table 8) it seems worthy of further investigation. 
It seems in most cases unprofitable to suggest sites for boreholes 
in advance of any actual proposal to resort 
Sito for boi'clioli'. , J • ' 1 , T 
to such operations ; but 1 cannot resist the 
temptation to point out a most desirable site for testing nearly 
the whole vertical succession of coal horizons in this field. This 
site is in the low ground immediately north of Kurasia village, 
somewhere near the hollow tree-trunk embedded in clay that 
serves as the village well. Such a hole would probably be too 
low for horizons 5 and 6, but would pass through all the others, 
if there are no complications due to faulting. My reading for the 
height of this well is 2,164 feet, so that horizons 4, 3 and 2 should 
be encountered in the first 200 feet of the bore-hole suggested. 
B. Tfie Chirmiri Area. 
We may now consider the correlation of the coal seams in 
the Chirmiri area one with another, and with those of the Kurasia 
area. The most important exposure is that occurring at the water- 
, . , fall in the Kaoria Nala known as Karar Khoh, 
Correlation of .seams. ^ ^ c i- , i , 
^ and also lor some distance down the bed 
of the Kaoria Nala, and up its side tributaries. The 36 feet of coal, 
