317 
associated quartzites, and both investigators note the remark- 
able blue opalescence of the quartz grains present in the 
granite. 
À ( 
% 
Ls 
% 
: 
: 
= 
3 
a 
- 3 
te £ 
^ S 
te i 3 
2o 3 
8 
3 
5 
m a 
E à 
E eo 
^ 
Ei 
LI 
eo 
E id 
Pe ML LIT 
As far as the writer is aware, no further data are avail- 
in : 
able of this intrusion. 
* 
