7S 
Records of the Geological Survey of India. 
[vol. via. 
fluence with the Phopas. It is a typical Barakar sandstone, and dips south-westerly at 15°. 
This rock forms the left bank of the Tawa for a quarter of a mile. It becomes much 
crushed and silicified, and is finally cut out by a run of broken Talchir rock agglomerated 
by silica. Up the Phopas, there is an ascending section for some 200 yards, the upper beds 
haying somewhat the aspect of Motur sandstone; and they abut at a moderate angle 
directly against the same crushed mass of Talchirs. There is clearly here a fault of 
very considerable throw. The ridge of crushed and indurated Talchir rock is about 40 yards 
wide ; and immediately on its south-west side the boulder-clay is quite undisturbed. 
In the small stream running parallel to the Phopas under the Lodadeo ridge, and at 
100 yards from the Tawa, there is a two-feet seam of bright coal, 
The Lodadeo stream. , 
covered by strong sandstone and resting on thick carbonaceous 
shale. The dip is 23° to west-south-west. Per more than a mile in a direct line typical 
Barakar rocks are exposed at intervals up this stream; the dip is very variable in amount 
and direction. The last outcrop, at west-6°-north from Lodadeo, is a white sandstone, dip¬ 
ping north-easterly at 15°; Talchir clay occurring close behind it at the same level. The 
fault here is unaccompanied by any crushing or vein rock. 
The Dolari fault. 
The above indicate all the outcrops in the Dolari area. The continuation of the measures 
along the south base of Lodadeo has not been followed out. In 
the stream north of Dolari, I fully expected to find the repetition 
of the main section in the Tawa, the ground between being quite flat, with nothing to sug¬ 
gest a great break in the rocks. At the nearest point, however, just to north of the village, 
typical Motur beds occur, having a low southerly inclination, and continue so to westwards. 
In proceeding down the westerly reach, there is a run of fracture with quartz veining; 
and the dip increases, through an ascending section of the same sandstones, to within 
300 yards of the Tawa, where it is 30° to south-south-west. The actual rock against 
which these sandstones abut is not exposed in the banks of the stream ; but a little below 
its confluence with the Tawa, there is a good section of one of the reefs of broken rock 
cemented by quartz infiltration, so frequent in this region. I believe the rock it includes 
to he Talchir; but owing to the small scale of the map, I have not complicated it by 
attempting to represent those small and obscure outcrops. Talchir clay is seen at several 
points with a low northerly dip on both hanks throughout the Baspur reach of the Tawa. 
There can he no doubt of the presence of a great east-west fault, having a northern down¬ 
throw of several hundred feet, bounding the Dolari coal-field on the north. Two miles east 
of Dolari, at the angle of the stream south-east of Siwanpat, there is an outcrop of broken 
and silicified rock on the exact run of the Dolari fault. The whole country here north of 
tiie Tawa is deeply covered by soil. 
Site for a boring. 
A boring in the gully between the two villages of Dolari 
ought to cut all the coal within 250 feet from the surface. 
The Machna Aeea. 
The Dolari fault is well seen in the Tawa at the bend below Baspur. A mass of crushed 
Talchir rocks indurated by silieious infiltration projects into tbe 
The Golai reach. . , , 
river from the west. Close under it on the left bank, massive 
wliite Barakar sandstone is seen dipping at a moderate angle from tbe fault; but within a 
few yards it turns up to a low southerly inclination which lasts throughout this north¬ 
east reach of the river, and as far as a pair of strong trap dikes cutting very obliquely 
in a nearly east-west direction, across the Tawa, under Gola.i. The sandstones throughout 
this length are decided Barakar, and unless repeated by faulting (of which there is nq 
