936 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
the top of the small quartzite hill, No. 1. At its western end the ore-band, 
as far as can be judged from surface indications, terminates abruptly 
against quartzite, from which it is possibly separated by a fault indicated 
by the presence of some vein-quartz. At the east end the ore-band 
descends to low ground and possibly dies out in lenticular fashion, for 
there is no trace of it on the quartzite hill, No. 2, lying immediately to the 
north of ore-band B. In one place the ore-band is divided into two parts 
by a 1-foot-parting of soft fine-grained mica-schist. The rock compos- 
ing the ore-band is softish black manganese-ore, usually showing 
remains of yellow spessartite. In one place was found a horny-looking 
spessartite rock with veins and layers of pinkish rhodonite. 
By December 1906, these excavations had been much deepened ; in 
one place a depth of 50 feet down to the surface of the water was mea- 
sured, and the water was said to be 10 feet deep, giving a total depth of 
60 feet from the surface. The ore is said to be just as good at this level 
as at the surface. At this spot, i.e., near its western end, the band had 
been faulted, so that steeply dipping ore-layers, with an underlying 
layer, 2 feet thick, of a friction -breccia of quartzite fragments and pulver- 
ized mica-schist, etc., rested against the edges of ore-layers having only 
a shallow dip (nearly horizontal). 
The southern band (B) is 650 paces long as measured in a straight line 
and 707 as measured along all the bends. It varies 
The southern band (B). . c>a i. x i. rri. 
m Width from 24 to 40 feet, ihere is no reason 
why this band should not continue for some distance to the east ; it 
is simply a question of removing the over-burden of pebble-ore and 
soil in order to find out. It may also continue to the west, except 
that if band A be terminated by a fault, then this same fault may 
also cut off band B. The western portions of this band lie on low 
ground, but the eastern end runs across the southern slopes of the 
quartzite hill, No. 2, nearly reaching the top of it at C (Fig. 2. Plate 40). 
At this point a pit shows that the ore has been overturned in exactly 
the same manner as is shown in fig. 59 for Mansar. At H (Fig. 2, Plate 40) 
a thickness of 4 feet of mica-schist divides the ore-band into two parts, 
6 feet lying to the north and 18 feet to the south, of the mica-schist 
parting. The ore-band is composed mostly of dirty ores, very frequently 
spoilt by bands of spessartite, rhodonite, dark grey quartzite, white 
quartz and micaceous films. 
The ores consist of the usual mixtures of braunite and psilomelane. The 
former tends to predominate, and occurs as minute grains, set sometimes 
>iature and quali- in hard psilomelane and sometimes in a soft black 
ty of the ores. matrix. It is this latter constituent that imparts 
to such a large proportion of these ores their sooty character, so that, 
unlike the majority of the ores of this district, the Mandri ores almost 
