864 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
Or, taking an average dip of 00°, the actual thickness in the South 
Hill varies from about 60 feet at level 1 io about 87 feet at level 4. 
Plate 29 shows the ore-body in South Hill, {(hi the saddle, North Hill 
and East Hill, the boundaries of the ore-band are obscuied by debris, 
so that it will not be possible to give the actual thickness until cross- 
cuts have been made across these parts of the deposit.] The various 
levels indicate that on the north-north-east side of the ore-band there 
is a thickness of about 100 feet of a fine-grained (often granulitic) 
gneiss, composed of quartz and microcline, with subsidiary oligoclase, 
a fair amount of magnetite (?mangan-magnetite), and often muscovite 
in abundance. This rock may vary from whitish to pinkish in colour, be 
either very hard or quite crumbly, and if much mica be present it mav 
be very schistose. It is separated from the main ore-body by a 
small thickness of interbanded ore-layers, spessartite-bearing and other 
quartzites. On the side of the gneiss remote from the ore-body, i.e., 
towards the middle of the horse-shoe, is typical mica (muscovite)-schist 
occupying all the ground between the south and north hills. The clearest 
section of the country on the north or hanging- wall side of the ore-body 
was seen in level I and was as follows (measurements horizontal) : — 
49 feet . . fine-grained magnetite-mu-:covite-microcline-gneiss, 
I foct . . interbanded gondite, quartzite, and manganese-ore, 
4 feet . . soft manganese -ore. 
1 foot . . veiy fine-grainod, soft, tlove-coloured, sandy rook, with bands of 
gondite altwed in places to manganese-ore, 
1 foot, 5 inches . soft manganese-ore with two 2-inch partings of the soft sandy 
rock. 
70 feet 
the main ore -body of solid braunite-ore. 
The only clear section of the rocks on the footwall or south side of 
the deposit was also in level 1 and was as follows (measuring away from the 
i(^posit in continuation of the above) : — 
1 foot 8 inches 
6 inches 
9 feet 6 inches 
29 feet 
29 feet 
10 feet 
1 1 f;-ot 
20 feat 
■35 feet 
dark grey quarizite, partly replaced by mangane e ore. 
soft mangane.-e-ore, 
soft dove-coloured sandy rock (of lenticidar shape) and fine- 
grained mica-schist, with a thin band of manganese -ore, 
interbanded manganese-ore and dark giey quar zites, often con- 
taining spessartite, 
fine-grained mica-auartz-schist and decomposed spessartite- 
bearing quartzites, 
rather soft manganese-ore (this is the overturned part of the 
ore-body), 
interbanded soft dove-coloured sandy rock, spessartite-quart- 
zite, and mica-schists, 
mica-schist with little quartz lenticles, 
soft micaceous pink and grey schistose gneisses containirg a 
band of dark grey quartzites. 
Here start the talas-ore quarries. 
