944 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
The thickness of the main- band was, in February 1904, nowhere 
fully exposed ; but, on the hill at the east end of the deposit, a cleating 
down the south slope showed a thickness of 92 feet, measured horizontally , 
with a dip of about (50°. This corresponds to a true thickness of 80 feet. 
This gives the thickness only of the band exposed on top and down the 
south slope of the hill. The ore-band certainly also crops out for a little 
way down the north slope ; but how far could not be ascertained on 
account of debris. But the total thickness of the ore-band may be 
as much as 100 feet at this point. There are indications of almost as 
great a thickness in other parts of the band ; but in between the points 
of great thickness the ore-band probably contracts considerably in width, 
for in places it practically disappears at the outcrop. Even by the time 
of my second visit in December 1906, a complete section of the ore-body 
had nowhere been rendered visible by cross-cutting the ore-band. The 
extreme eastern end of the ridge was however being opened up. This 
opening showed a thickness of 51 feet, the dip being vertical. The north 
wall of the deposit was not, however, exposed, so that the full width 
of the deposit must be greater than 51 feet ; but it hardly seemed likely 
that it could be as much as 100 feet. The thickness of 51 feet included 
a layer, 6 feet thick, of mica-schists, with some sandy white quartzite, 
situated near the southern wall of the ore-band, whilst there were also 
some thin layers of mica- and quartz-schists acting as partings between 
the ore-layers. 
At the western end there is a parallel band, the eastern end of which 
The sulisidiai V f ie- ^^^^ somc 50 yards to the south of the main-band, 
ij^iiid. and extends for some 600 yards in a west-north- 
west direction, its western extremity lying further to the west than that of 
the main ore-band. This subsidiary ore-band is represented by two 
parallel outcrops, probably due to a synclinal fold. They crop out 25 to 
40 yards apart, except at the western end, where the outcrops run to- 
gether at the Surface. This band, also, was not properly exposed; 
but in one place where the dip was 50°, it was at least .30 feet wide 
measured horizontally, corresponding to a true thickness of 2.3 feet. 
The main mass of the hills on which these ore-bands occur consists 
as already mentioned, of vitreous quartzites, usually 
L oiin ly . micaceous. There is also a certain amount of 
felspathic quartzite, and of a very acid pyroxenic gneiss. The actual 
' country ' of the ore-bands is but poorly exposed. But in two places 
the main ore-band is seen to rest on mica-schists, which in 
one place form the overlying rock also ; whilst in another place the 
south wall-rock is 1^ feet of fine-grained quartzite overlain by coarsely 
crumpled mica-schists. The ' country ' of the subsidiary band was 
nowhere exposed, but will perhaps also be found to be mica-schist. 
