674 NORMAN L. BOWEN 



rich and is transitional into albite-rich adinole, a product of contact 

 metamorphism of slates. 



6. The writer believes that the granophyre was, with the adinole, 

 formed by hydrothermal action at the contact; it is an adinole which 

 has crystallized from a state of aqueous fusion and hence with all the 

 textures of an igneous rock. 



7. The literature of albite-rich igneous rocks shows their general 

 association with gabbros, intrusive into argillites, and leads the writer 

 to believe that a somewhat similar action may be of rather common 

 occurrence. 



In conclusion the writer desires to thank the Ontario Bureau of 

 Mines for those chemical determinations of this paper which were 

 made by Mr. N. L. Turner, provincial assayer. 



