Chap. XLI.] shimoga: shiddarhalli. 1149 
20. Kanjiganagutti (Shiddarhalli Main Deposit). 
This deposit lies about | mile due north of Shiddarhalli village on 
a little ridge situated on the eastern slope of a N. W. -running ridge of 
hills. This little ridge is capped by a lateritoid rock composed of a 
mixture of iron- and manganese-ores. The outcrop of this rock is about 
95 paces long and rvms first N. by a little W. and then N. N. E. It 
shows signs of a dip to the west side, this dip being doubtless that poss- 
essed by the rock from which the lateritoid has been formed by replace- 
ment. The deposit is held by Messieurs Jambon and Cie. and has been 
opened up by means of a series of parallel trenches at right angles to 
the strike of the ridge, and on its western slope. At the eastern end 
the trenches are sometimes as much as 18 to 24 feet deep and then 
show interesting sections. The following may be taken as typical and 
as indicating that the lateritoid has been formed by the replacement of 
some original argillaceous rocks such as slates or phyUites : — 
5 feet. Lateritoid, composed in some places of the corneous 
hematite noticed at Treasury Hill ^seepage 1147,i, often with 
pisohtic spots of wad and psilomelane ; and in some 
places entirely of the pisohtic lead-like psilomelane. 
9 feet. Of psilomelane becoming waddy and ferruginous with in 
creasing depth, and with patches of clay. 
10 feet. The foregoing passes downwards in the next 10 feet into 
a mottled clay showing streaks and patches of red-brown 
clay in a soap-like, finely mottled, cream and brown clay. 
In this clay there are numerous veinlets and ring-shaped 
concretions tending to be hmonitic and consequently harder 
than the associated clay, so that it looks as if this rock 
might turn into the overlying lateritoid by a continuation of 
the process of introduction of iron. Occasional patches of 
soapy wad are also still present. At the very bottom of the 
cutting, cream-coloured lithomarge, still mottled and streaked 
with the brown clay, begins to appear. 
The cream-coloured clay or lithomarge seen at the bottom of the 
cutting shows when broken signs of original slaty structure, and so 
may be taken as representing an original slate or phyllite. The evidence 
of the foregoing section is I think very strong in favour of the lateritoid 
