JOURNEYS THROUGH KOREA. 



113 



As low conical gi'anitic mounds are seen scattered here and 

 there on the plain, while the mylonitized granite (orthogneiss), 

 which is only a patliological variety of the same, forms the 

 moat-like crest, it may be safely assumed that the granular 

 granite yields more easily to weathering and abrasion than the 

 sheared and pressed granite. The plain we passed through is 

 therefore formed by differential degradation and worn away in 

 the granitic tcrrane. Such granitic basins are frequently met 

 with, and constitute one of the characteristic land -features of 

 this country, indicating at the same time that the peninsula has 

 been in the continental period for a long geological ceon, at least 

 since the beginning of the Tertiary. 



1 : 1,143.000 



Sketch map showing Mr. Yabé's route in the "Spatulate Mesozoic area,'' 

 the clotted lines bain" the writer's rente?. 



