Chat'. XXX.] 
NARUKOT STATE. 
647 
the edge of the hill fragments of the gneisses are seen as isolated inclu- 
sions or xenolitlis in the granite. The photograph, reproduced in 
Plate ]7, fig. 1, shows a very line example in which all the fragments 
included in the granite consist of manganiferous rocks and manganese- 
ore. 
The field evidence thus shows that these gneisses are older than the 
granite, and that the latter probably passes right under the gneisses of 
the hill. 
It seems probable that the alteration of manganese silicates to man- 
Timo of -utcruion ganese-ores took place before the intrusion of this 
of luangimeso-silicatcs granite, which has picked up and 'fossiUzed', as it 
were, both the unaltered and partially-altered 
manganese-silicate-rocks, and the completely formed manganese-ore. 
There can be little doubt about the Archaean age of this granite ; it is 
probably contemporaneous with the Bimdelkhand granite. Hence in 
this one particular locality we can, with a fair amount of certainty, fix 
the period during which the manganese silicates suffered chemical alter- 
ation with production of manganese-ores as Archaean. 
These gneisses consist of bands of a large variety of rocks composed 
Minerals found. 
Cbaicopyrite 
Quartz. 
Braunite. 
Calcite. 
Felspars 
i'yioxencs 
Hornblende. 
Garnets 
Scapolite. 
Zircon. 
Epidotes 
Tourmaline. 
Micas 
of various combinations of the following minerals : — 
(in one rock only). 
fOrthocIasc. 
i Microcline. 
j^PlagiocIase. 
( Several species, including diopside, wollastonite, rh do- 
^ nite and other manganese-pyroxenes. 
r Spessartite. 
•< A red garnet. 
C A pale-brown garnet. 
f Epidote. 
(.Pi 
Piedmontifco. 
f Manganese-micas. 
i 
Sphene. 
Apatite. 
Biotite. 
