Chap. XLI.] 
SHIMOGA DISTlUCT. 
112? 
is shown by Mr. Slater on his mop' of this area as having mangaucse- 
and iron-ores on top. These are said to be of no value and similar 
to the occurrences on the top of Urumanjanmatti. On the sloping 
and level ground on the north-west base of Kannikalmatti, how- 
ever, somewhat extensive deposits of detrital ores have been found. 
Those portions of these deposits lying in the Kadur district are he'd by 
the Shimoga Manganese Company, and those portions lying in the 
Shimoga district by Messieurs Jambon and Cie. Most of the openings 
show detrital nodules and boulders of manganese-ore in a matrix of 
clayey soil. But in two places what is possibly ore in situ seems to 
have been found. In one of these, isolated concretions of psilomelane 
are seen in a matrix of yellow ochre. The other occurrence is in a 
big trench running N.30°E. and as much as 25 feet deep in places. The 
ore is mixed with clay and yellow ochre and seems to be more or less 
massive in places, but I am not certain that this is not really a closely 
packed detrital deposit. That some of the ore is probably in 
situ is indicated by the presence of broken veins of quartz, partly 
replaced by manganese-ore in places. The whole occurrence is, however, 
obscure. In any case it is probable that a considerable proportion of 
the detrital ores of this area has been derived from the top of Kannikal^ 
matti. The ore consists of both the dull grey and lead-like varieties of 
psilomelane, with a tendency for the boulders to show a coating of 
wad. The distance to Tarikere Railway Station, Southern Mahratta 
Railway, is about 9 miles. 
Shimoga District. 
[See Plate 57.) 
This is the district in Mysore in which manganese-ore deposits of eco- 
nomic value were first found and also worked. 
History. j^^^ jggg , sesquioxide of manganese ' 
from this district was exhibited at the Madras Exhibition and was 
then used at the Madras School of Arts for colouring glass and 
pottery'-. In 1899, Mr. H. K. Slater of the Mysore Geological 
Department^ discovered indications of the Kumsi deposit^ which he 
1 Loc. cit. , Plate II. 
2 Reports by the Juries, p. C, (1856). 
3 Bee. Mys. Gecl. Dept., IV, pp. 19, 138, (1902-03); V, Paitl, p. 34, (1903 04). 
