1919.] The Sixth Indian Science Congress. excili 
and gneisses and which are intruded by the dolerite dykes. 
The latter show no signs of crushing or movement whatever. 
It must be remembered that Maclaren regarded the schists 
as laid down on, and later than, the fundamental gneiss and 
was therefore debarred from regarding the latter as a source 
of the quartz and gold. We take the opposite view as 
explained in the following section.” 
According to these authors (/.c., p. 10)— 
‘*The auriferous veins of the Kolar field are intrusive 
to be regarded as one of the end-products of a granite 
intrusion. Tongues of micro-granite which are regarded as 
belonging to the Champion gneiss come into the Mysore 
mine in close proximity to the Champion lode and the 
quartz of the latter has been observed to penetrate 
these tongues.” 
‘On the other hand, the great mass of the Peninsular 
gneiss cuts off both the auriferous schists and the Champion 
gneiss while the pegmatite veins and cross-courses which cut 
the Champion lode are probably products of the intrusion 
of the Peninsular gneiss. The auriferous veins of Kolar 
appear therefore to be subsequent to the Champion gneiss 
and prior to the Peninsular gneiss (or some of it) and in 
seeking a granitic origin for the gold-bearing veins the 
Champion gneiss. appears to offer a handy and suitable 
source.”’ 
the gold with the Champion gneiss, I am inclined to_ 
Smeeth and P. Sampat Iyengar in attributing the auriferous 
