CiiAr. XXXVI. I 
NAGPUR : RAMDONOUI. 
857 
sides of the liill, where the slope becomes less, the average size of the, 
pebbles is from I to (i inches diameter. These pebbles are set in a 
ferruginous clay, which largely falls off in the process of extraction and 
cleaning. Every pebble has to be broken, and the clerk in charge of the 
work said that -10°/^ of them on being broken are found to bo good (^re ; 
the remainder, composed of poor ore, spessartiferous rock, quartz, etc., 
are of course thrown on the waste heaps. 
At its west end the main mass of the hill is joined to a small hillock, 
12, by a neck composed mainly of slightly altered. 
'"■ interbanded, quartz and gondite. Among the rocks 
composing this neck is one of quartz and martite. On this hillock 12 
there is some good ore like that of Kodegaon, and also some par- 
tially altered rhodonite, and some rock consisting of resin-coloured gar- 
nets set in the ordinary black ore. 
.Attention may be here drawn to the extremely beautiful new man- 
Blarfordite ganese-pyroxene, blanfordite, an account of which 
will be fomid on page 127. It is found sparingly in 
a pyroxene-felspar-rock, occurring as patches in the ore-bcdy on the 
top of hill 5. I'his rock is probablv an intrusive into the main mass of 
manganese-silicate-rock and manganese-ore. 
Hill 4 is formed by another of these lenticular masses of nianganifer- 
jjjl, ^ ous rock. The dimensions of the lenticle as marked 
on the map are roughly 1,-500 feet long by 700 feet 
broad, but it is to be understood that the actual boundaries of this — as of 
most other deposits — are partly conjectural due to the boulders and 
pebbles found on the lower slopes of the hill. The hill is constituted 
partly of good ore, and partly of gondite, more or less altered. The ore 
seems to occupy the central portion of the deposit, the northern and 
southern portion? consisting mainly of the spessartiferous lock, whilst 
even the good ore passes into spessartiferous rock along the strike. In- 
tercalated with the ore, on the south side of the summit, are light and 
dark grey quartzites and a little gneissose rock ; the dark grey quaitzite 
is the usual manganiferous rock so often found with the ore deposits. 
A moderate quantity of fairly good compact ore can be obtained from 
the very top of the hill, but as a large proportion of it is rendered un- 
marketable by soft black spots and patches and by spessartite, the 
amount of good ore cannot be large, and it seems doubtful if it could 
pay to work this deposit except when prices rule high. Even of talus- 
ore there does not appear to be a large quantity. 
Hill No. 4 deposit does not reach quite as far as the Ranidongri nala, 
Hillock rj ^^^^ ^^^^ stream bed and banks, directly on 
the line of strike of the lenticle, being various 
