720 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV: 
to the west side, but near the north end where the strike curls round to 
north -north-west the dip becomes much smaller (20°— 35°), and 
I ORE-BtOS AT SURFACE ' 
I FOR ABOUT +00 FEET ' 
I MEASURED HORIZONTALLY. I 
scale;- ! I FEET 
Fig 44. — Section across the Hirapur portion of the Balaghat manganese-ore deposit. 
as the ore-band is waved it is kept at the surface for some 400 feet 
down the west slopes here, really owing to a fold that runs west of 
south down the hill side. Figure 44^ is an east and west section across 
the ore-body at this point (C in figure 42) . Throughout this portion 
of the outcrop there is a much larger proportion of ore than on the 
Bharweli portion. The ore is partly dull grey psilomelane and partly a 
very fine-grained light grey crystalline ore that glistens brilliantly in 
the sun. Owing to its very fine and uniform grain, it has been 
caused by the earth-movements that have folded and twisted the rocks 
of this hill to assume structures that are usually imparted only to 
slates and schists. Thus, many of the divisional planes of the ore when 
uncovered are found to be waved as if with ripple-marks, while in some 
places the ore actually shows a sort of slaty cleavage. Besides the divi- 
sional planes parallel to the original bedding, the ore- body is often 
traversed by joint-planes, which in one place are so numerous that the ore 
breaks up into little rhomboidal fragments. As usual the underlying 
rock is the jaspery quartzite, resembling sandstone in planes. 
The ore-band soon curls round to the north-east, first dipping steeply 
TheManegaon portion, to the north-west and then at an angle, which be- 
comes less and less, to the north-east. At first the outcrop is very 
bold, consisting of perhaps | quartzite and | ore, with a thickness of about 
15 feet. In one place a huge mass of ore, which I estimated as weighing 
180 tons, had fallen over to the east side. Further north the outcrop 
often consists to such a large extent of red, black, and grey 
quartzites, and is so veined with quartz, as to be unworkable. And 
1 As will be seen, this figure contains an error; the bracket corresponding to 'man- 
ganese-ore bed' has been carried about O'l inch too far to the right. 
