304 



numbers of these fragments occur in the intrusive rocks 

 but disappear within a few yards. They may have been 

 shattered to smaller fragments and assimilated by the 

 intrusive rocks while still in a magmatic condition, for of 



Contact shatter breccia at contact of Wark gabbro-diorite gneiss and Saanich 



granodiorite, showing both angular and rounded xenoliths; ledge south 



of Outer wharf, Victoria. 



this there is some evidence, or they have sunk in the intrus- 

 ive magma to abyssal depths. Possibly it was by this last 

 method that the granitic rocks replaced large volumes of 

 the rocks into which they were intrusive. 



As described, the granitic rocks were not irrupted at 

 the same time, but during two main periods, which have 



