364 K. A. DALY THE OKANAGAN COMPOSITE BATHOLITH 



is anomalous among these masses. The comparatively small size and the 

 isolation of the nepheline-rock body and its structural characteristics and 

 relations appear to warrant the conclusion that it is the product of a very 

 special differentiation. Neither malignite nor nepheline syenite seems 

 to represent a general subcrustal magma in the region at any time. It is 

 different with the small bodies of gabbro in the roof pendants of the bath- 

 oliths. The repeated occurrence of gabbro, not only in the Okanagan 

 range, but throughout the length and breadth of the Cordillera, as 



Figure 7. — Ground Plan showing Relations of the Castle Peak Granodiorite to the de- 

 formed Pasaylen Formation. 



Strike and dip lines in solid black ; faults in broken Ifaes. Figures show values of dip. 



Scale, 1 : 115,000. 



throughout mountain ranges all over the world, signifies the strong proba- 

 bility that the bodies now occurring as the Chopaka, Ashnola, and Basic 

 Complex intrusives emanated from a general basic couche underlying the 

 mountain range. 



Excluding the Kruger Alkaline body, then, it is seen from the table 

 and from the petrographical descriptions that both of the respectively 

 consanguineous series belong to a still greater series forming one petro- 

 genic cycle. In this cycle the law of increasing acidity and diminishing 



