336 Postelsia 
most wholly quartz veins (PlateX XIX). They pre- 
sent no regularity of direction beyond that seen in 
the shaly partings and less conspicuous master 
joints of the district. Rarer minerals noted are 
feldspar and pyrite. Gold no doukt occurs 
because it has been found in paying quantities 
at several points along the coast adjacent to 
Providence Cove and Port Renfrew, and gold 
is one of the most universal minerals of ancient 
crystalline rocks. 
After all these events the upturned edges of 
the rocks were worn down. The present sur- 
face rocks once were rock masses thousands of 
feet below the surface. The slow and unerring 
processes of uplift, weathering and wear have 
loosened millions of cubic feet of this rock to 
become the play of the waves and the compacted 
material of subsequent geologic epochs. How 
many times transport and deposit have been 
effected along this coast does not yet appear; 
but the record is spread of one. 
Out of the material worn off the tilted shales 
another formation was built. Its beginning and 
progress have been so recent that within the 
