1076 
MANGANESE DEPOSITS OP INDIA : DESCRIPTIVE. [ PaRT IV : 
Towards the north end of Sandanandapuram there is a large pit 
Lithomarges containing a considerable depth of water. 
Along the east wall are exposed fine-grained 
banded gritty lithomarges of various colours and' in some places a 
granular quartz-rock with a subordinate kaolinic matrix. A large 
quantity of ore is said to have been obtained from this pit, and, to 
judge from heaps of small granules lying on the banks, this ore was 
chiefly pyrolusite occurring as segregations scattered through the 
lithomargic clays, from which the ore is said to have been separated 
by washing and sieving. 
On the low ground immediately to the west of these pits there are 
numerous outcrops of the diopside-scapoUte- 
bcapolitic gneisses. . '- . . 
wollastonite-rock, often containing garnets 
and in places intruded by quartz-felspar-rock. These rocks are much 
twisted, with very irregular dips to the east side of the strike, which 
averages N. N. W. 
Practically all the ore seen in the ground was in detrital accumu- 
lations, although much pyrolusite was appar- 
ently once obtained as segregrations in litho- 
marge. From the stacks, containing about 
100 tons of ore, I took snmple A. 29, which was chiefly pyrolusite, 
usually slightly cavernous, some pieces being very fine-grained and 
some showing stellate crystalline groups up to | inch in diameter. 
There v, ere also a few pieces of psilomelane and of compact fine- 
grained wad, while one or two pieces looked Uke blackened pyroxene. 
The sample was analysed by Messrs. J. and H, S. Pattinson with the 
following result : — 
Sample No. A. 29. 
Nature and quality 
the ores. 
of 
Manganese peroxide 
Manganese protoxide 
Ferric oxide 
Baryta 
Silica (combined) 
Silica (free) 
Phosphoric oxide . 
Water (combined) . 
Moisture at lOO^C. . 
72-03 
4-50 
6-85 
6-96 
1-80 
0-10 
0-36 
3-80 
0-75 
