1014 
MANGANESE DEPOSITS OP INDIA : DESCRIPTIVE. [ PaRT IV : 
outcrop 133 feet wide, the southern outcrop of Hunase-marada Kativi 84 
feet across, and the northern outcrop of the same deposit 200 feet across. 
The length of many of these deposits is consideiable. Sannasil 
, , Haruvu T measured as 408 feet ; the Raman- 
Length of the deposits. . -r. T • 111 , r,^ t 
drug Mam Bed is probably at least 700 feet 
long, although it would be difficult to give an accurate figure with- 
out a careful survey ; Alada-marada Banda is 112 paces long ; Durgsimma 
KoUa is 423 feet long (according to Mr. Ghose) ; the southern outcrop 
of Hunase-marada Kativi is 357 feet, and the northern about 500 feet 
long. Many of the deposits show, of course, outcrops of less length and 
breadth than the figures given above. 
We can now make a rough guess at the amount of ore available in 
the Sandur Hills. Mr. Ghose thinks that if we 
Qufintities of ore. i ^ t , i • i i ji 
take the 40 largest deposits the average length 
can be taken as 400 feet, and the average width 50 feet. If we assume 
that the average depth to which each deposit extends is only 50 feet, then 
the number of cubic feet of ore is 400 x 50 x 50 x 40 = 40,000,000, which, 
taking an average specific gravity for the ore of only 3'5, = 
40,000,000 X 62-5 x 3-5 „ _ , 
— 2240 = 0,900,000 tons approximately. 
If the average depth to which the deposits extend be taken as 80 
feet instead of 50, then the amount of ore works out as Gj million tons. 
Mr. Ghose regards even the latter as a conservative estimate. 
These figures have to be reduced, however, to allow for interbanded 
iron-ores ; nevertheless considering the fact that on opening up a 
deposit the length and width are often found to be greater than indicated 
by the outcrop, I am inclined to agree that they do not overstep the 
mark. Probably if we allow for the other 50 deposits, and for deposits 
in other parts of the State not yet explored, it will not be exaggerating 
to say that there are probably 10,000,000 tons of manganese- 
ore to be extracted in this State. A considerable proportion of this 
10 million tons will, however, be fairly ferruginous, and have to be sold 
as ferruginous manganese-ore, rather than as manganese-ore proper. 
Nevertheless, making all deductions there can be no doubt that there 
are large quantities of manganese-ore in the Sandur Hills. The 
figure given above can only be regarded as a guess. It is, of course, 
passible that it not only does not overshoot, but that it is very much 
