884 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [PaRT IV : 
The manganese-ore shown on each side of the spessartite-rhodonite- 
barytes band is often more or less impure owing to remains of these 
minerals. 
In the Satara pit immediately to the south-east of the Kumthi Lady 
S.W. 
N.E. 
Talus-ore. 
Fine gravel. 
Quartzite 
gravel. 
Decomposed 
schists With 
scattered piso- 
lites of manga- 
nese oxide, 
which are very 
abundant in 
the 1-foot bed 
at the base. 
Ficr. 61. — Section across one of the Satara Pit.-i, Chargaon. 
Pit, the section shown very roughly in fig. 61 was visible. The 
Th- Satara Pit« manganesc-ore at the junction with the overlying 
schists is apparently the good quality hard 
variety, but a few feet away from the junction it becomes interbanded 
with quartzite and more or less garnetiferous. The overlying ' country ' 
is very decomposed, but once consisted perhaps of bands of mica-schist, 
spessartite- quartzite, and dark grey quartzite. The interesting feature of 
this section is that where these decomposed rocks rest on the manganese- 
ore they are full of very numerous pisolitic concentric-structured 
concretions of manganese oxide. For a thickness of one foot these 
concretions are so abundant as to constitute about half the rock ; but 
they become gradually scarcer with distance from the junction. The 
pisolites are also very abundant for a depth of about one foot below 
the overlying talus deposits. All these schists were very damp, even in 
January, when there had been no rain for weeks, so that it seems likely 
that the junction between the ore-body and the schists is a path 
along which water circulates, and that in so doing it impregnates the 
schists and deposits manganese oxides in them. There was water in 
this pit at a depth of 17 feet below the surface. 
At the north-western end of the ore-ridge there is a quarry showing a 
Quariv at the north- ^'^U interesting Section, illustrated in Plate 34, 
western end. figures 1 and 2. This section shows that the thick- 
ness of the ore-band is here 46 feet measured horizontally, the dip of the 
rocks being very steep (practically vertical) to the north side. The 
north wall of the deposit consists of very fine-grauied greyish white mica- 
quartz-schist (C in figure 2 ) containing interlaminated with it one or two 
bands of ore and dark grey, sometimes spessartite-bearing, quartzites. 
