118 THE ROYAL SOCIETY OF CANADA 



which gold rose from the deeper parts of the earth, and was deposited 

 in such fissures as occurred in the rocks at the time, no matter through 

 what agencies those fissures were produced. 



8. The existence of a single Epoch in the Pre-Cambrian, charac- 

 terised by the formation and presence of veins carrying such a distinc- 

 tive and much sought for mineral as gold, should be of great service in 

 assisting in the determination of the age of other formations in these 

 old rocks, where so many criteria which can be used in the de- 

 termination of the age of later rocks are not available. 



