CiiAP. XXXVT.] 
N-.\ni'Tin : KODKGAON. 
817 
is a bluish grey, very compact mixture of braunite and psilomclane, 
the braunite ap])oaring as finely crystalline granules in a compact 
and ap])arently non-crystalline matrix of psilomclane. An analysis of 
this ore by n\e showed it to be a mixture of two parts of braunite 
and one part of psilomclane (see page ^^50). The specific gravity is 
about 4-55 to i-Gi). The small joints in this ore sometimes contain a 
film of brownish-black material that soils the fingers. The ore, of course, 
shows divisional pianos, which are stained red by ferruginous matter ; 
but they arc rather far apart, so that huge blocks of ore of a cubic yard 
or more in volume can sometimes be obtained. There also a small 
amount of an inferior sort of ore showing rather abundant jointing, 
while soft thin powdery black partings sometimes occur in the very 
best ore. As shown on the plan, the various vertical or nearly vertical 
divisional planes — usually one to two feet apart — have different strikes 
in difl'erent parts of the deposit, thus cuttiiig into one another. This 
may perhaps be due to the proximity, to the west, of Blanford's boundary 
fault between the metamorphic and crystalline rocks on the one hand 
and the Gondwanas on the other. There is also a set of joint planes 
dipping at 10° to 40° to the south-west. 
As regards other material : this though small in amount is of great 
interest. In the first place it is necessary to mention the complete 
absence of manganese-garnet, so characteristic of the deposits of this area. 
In one place in the middle of the quarry was an 8-inch band of the 
dark-grey, almost black, quartzite mentioned on page 343. It is only 20 
feet long, being terminated abruptly at both ends by ore. This may be 
taken as another sign of the proximity of the above-mentioned fault. 
In places there occur in the ore irregular veins and layers of a j^inkish 
Q^^^i white, very compact substance, which is really 
a variety of opal-silica having G. =:2'52. It is, 
of course, of secondary origin, for it fills in fissures in the ore. 
Lastly at the iouth-west end of the quarry there is band of cavernous 
hornstone-like quartzite, containing a large amount of pyrite in small 
p^,|.jjp grains and crystals ; some of the pyrite has changed 
to limonite. The cavities are frequently lined 
with minute quartz crystals, often iridescent from a coating of some 
compound of iron. In 1907 it was seen that this rock is a vein in the 
ore-body and therefore subsequent in time of formation to the ore itself. 
By the time of my second visit (in 1907) the quarry had been consider- 
Data obtained in ^'^b' enlarged. The true strike had been showm to be 
1907. ' ' E. 30° to 40° N. varying to north-north-east, the dip 
varying from very steep to the north-west side of the strike to vertical. 
This strike indicates that mines 1 and 2 are probablv on the same band 
of ore. The ground between tha two should therefore be opened up. 
