116 The Ohio Journal of Science [Vol. XIX, No. 2, 



of the Valley, indicating as definite a connection with the 

 subterranean magma at that point as in the upper Valley, 

 where large vents are more numerous. The whole area, thus 

 -giving evidence of the near approach of the magma to the 

 surface, is 20 miles (32 km.) in length, 9 miles (14.5 km.) in 

 greatest breadth and covers an area of 53 square miles, (137 

 sq. km.). 



The recognition of the fact that the Valley is truly volcanic 

 inevitably raises some questions of great interest and importance. 

 What are the geological relations of the magma beneath? 

 What are the reasons for its bursting through in this particular 

 Valley? Is it a batholith rising from the interior? What is 

 the relation between the formation of the volcanoes of the 

 Valley and the explosion of Katmai? Did the eruption bring 

 about any changes in the relative elevations of the several 

 areas concerned? Why does the Valley run transverse to the 

 main line of volcanoes which follows the axis of the peninsula? 

 These and other fundamental questions of similar character 

 open most fascinating problems for future study. If, as seems 

 possible, some of them can be solved, the study of the Valley 

 of Ten, Thousand Smokes will have taken us several steps 

 nearer the solution of the greater problem of volcanism and its 

 relation to diastrophism. But we are not yet in a position to 

 attempt the discussion of these matters. 



