173 FERMOR: GEOLOGY AND COAL RESOURCES OF KOREA, C. P. 
be able to trace the connection between such faults in the Bara- 
kars as can be directly observed and the presence or the proximity 
of intrusive dolerite. He will then iii'adiuilly discover to what 
distances from intrusive dolerite, eitlier dyke or sill, he is to 
expect faulting in his coal seams, even where the surface evidence 
gives no clue. 
In the course of my short examination of the Kurasia field I 
, . found only one fault actually exposed. This 
was m the Ivurasia nala, JN. JN. W. of Kurasia, 
at a point only about 1 furlong south of the main mass of 
intrusive dolerite (see Plate 23, fig. 1). There is good evidence 
for the existence of another fault, tlie direction of which could 
not be ascertained, in a tributary of the Kaoria Nala, the Gae-mara 
Nala and also in its tributary at a point about a mile south of a 
broad dolerite dyke ; there is also evidence of the existence in 
the same neighbourhood of the Chirmiri volcanic series, which 
must be regarded, in view of its observed effects at Chirmiri itself, 
as another possible factor in the disturbance of the Barakars. 
In several exposures, both in the Kurasia and Sanhat fields, 
where sandstones rest upon coal, 1 have found 
Lateral movements. . , r i , i , r . i n 
evidence of a lateral movement of the sand- 
stone relative to the underlying coal, which is frequently gently 
crimipled at its upper surface. In one or two places, moreover, 
this lateral movement has been sufficiently powerful to squeeze 
out a coal seam entirely, or to pinch it into small lenticles 
between which the overlying and underlying sandstone come into 
contact. This is particularly well seen in a rock fall in the 
Kachhan Kundi, a tributary of the Kaoria Nala, and is 
illustrated in PI. 23, fig. 2. At this point not only has the coal 
been squeezed into lenticles, but the coarse overlying felspathic 
sandstone contains irregular lenticular strings of the bright > coal 
substance so commonly found not only in the coalfields^ of ^ this 
State, but also in the coals from other parts of India, i where it 
is interlaminated with a duller and less pure coal. I can think 
of no method by which these coal stringers, which are evidently 
secondary with reference to the sandstone, could have reached their 
present position except a process of distillation from the coal and 
condensation in the overlying sandstone of the particular hydro- 
carbon compounds essential to the formation of this bright coaJ 
which must be regarded as the approximately pure coal sub- 
