The Two Islands. 29 



specimens from these localities are scarcely 

 distinguishable the one from the other. It is, 

 too, of like import that the altered limestones 

 of Bridge creek in the John Day valley, and 

 those from Woodville in the Rogue River 

 valley are easily mistaken for each other. A 

 like resemblance is at once seen between the 

 rich brown gabbros from the lower canyon 

 of Rogue river and those of the Blue moun- 

 tains east of Canyon City. Now, the places 

 these rocks occupy in the framework of these 

 islands, and the great similarity in the rocks 

 themselves, would indicate that the same ele- 

 vating forces operating at the same time and 

 upon similar materials, gave origin to these 

 islands. 



If now this ocean outlook of ours has been 

 sketched with anything like fidelity to the 

 facts, we may rightfully picture to ourselves 

 these two islands set in the ancient Pacific 

 three hundred miles apart, with the ocean 

 flowing freely between them. 



The steady action of the surf upon the 

 shore line would soon crumble the softer por- 



