postelsia 345 



quartz grains sufficiently to compact and develop 

 crystalline masses. It is quite obvious that the 

 concretions have been formed since the rock was 

 accumulated. Locally where calcium carbonate 

 was abundant it has involved nearly the entire 

 material of the formation. In this way the 

 rugged rock masses of Postelsia point and its 

 immediate neighborhood have been hardened 

 into enduring outposts along a rocky shore. 

 Animal and plant remains have been factors in 

 the hardening process. Remains of turtles, 

 molluscan species, and many fragments of ligni- 

 fied wood and seaweed are found in these hard- 

 ened masses. Segregations of plant remains 

 occur when hardened rock masses are broken. 

 That they yielded both carbon and oxygen for 

 the hardening process seems quite clear. 



In looking across the Straits of Fuca when 

 the air is clear, snow fields are seen upon the 

 Olympic mountains. They terminate in long- 

 tongued glaciers slowly flowing down through 

 the valleys until they are lost in tumbling 

 streams. The question occurs: Were there ever 

 such snow fields and glaciers around the Seaside 



