856 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [l^ART IV : 
quartzites shown on tlie map have been marked only where seen ; but seme 
ot them possibly connect up as shown. The quartzites forming the 
Kuthubia hills are separated from the Rilmdongri hills to the west by 
a well-maiked valley running north-north-west, and probably due to a 
fault having the same direction. 
Another feature, in addition to those mentioned on page 855, that 
seems to point to the manganese-silicate-rocks being igneous intrusives, is 
the fact that the backbone of hills 1 and 2 apparently runs into the 
ore-body of hill r> ; for there is no evidence to be seen in the nalii dividing 
hills 2 and 5 that could be taken as indicating the presence there of a 
fault. Also, where this deposit, at its west end, crosses the nilla shewn, 
it is interbanded with schists, quartzite, and gneiss, suggesting that the 
presumed intrusion terminates by breaking up into parallel bands 
intercalated between the pre-existing metamorphics. Even including 
these bands of gneiss, etc., the width of outcrop, in this nala, of the ore- 
body — which here mostly takes the form of spessartite-quartz-rock 
(gondite) — is only about 150 feet, and at the southern end of the 
exposure the spessartite -bearing rock is seen to dip to the west under the 
grey gneiss, again hinting at the terndnation of the ore-body ; this would 
also be best explained by an igneous origin. 
By referring to the map it will be seen that — neglecting the thin band 
that runs west to the bank of the Kanhan river and consists of rhodonite- 
spessartite-quartz-rock partly altered to manganese-ore — there are three 
distinct ore-bodies, forming hills 4, 13, and 5, respectively. They are 
all of lenticular shape, though ore-body 5 is divided at its eastern end. 
Hill 5 is practically the only one on which work had been done in 
jj.jj ^ 1903. The ore-body giving rise to this hill is of 
enormous size, in fact it is the largest I have yet 
examined. The total length is about 2,500 feet and the total 
width about 1 ,500 feet, whilst the hill rises to a height of about 140 
feet above the neighbouring low ground. A very large proportion of 
the ore is, hov.ever, quite unworkable, especially in the northern parts of 
the deposit, Avhere the rock is chiefly gondite in various stages of change 
into manganese-ore. Here also is some intercalated mica-sohist and 
pegmatite. There is, however, a band of good ore about 80 yards 
long on the south edge of the top of the hill and here a little work had 
been done in November 1903 ; but even this ore is of variable quality. 
The east, south-east and south slopes of the hill are covered by talus-ore, 
and it is here that the principal work had been done. These talus-pits 
were at the most only 10 to 12 feet deep on the side nearer the centre of 
the hill and of course less on the side farther away. The pebbles and 
fragments in these pits decrease, of course, in size with the distance 
from the top of the hill. In the maiti quarries on the south-east and east 
