JOURNEYS THROUGH KOREA. 193 



is a more interlocking of xenomorphic components. Granophyric 

 texture is of iversal unocciirrence. Porphyritic development is 

 frequent and it is the oligoclase which takes the form of the 

 phenocryst enclosed in a shell of flesh-colored orthoclase as in 

 the crystal-porphyry already mentioned ; and this characterizes 

 the rock in contrast to common granite ; and this also brings it in 

 close relation with the masanite. The typical rock is that found 

 near Fusan (p. 15). 



The grano-masanite occurs always in the intrusive 

 laccolithic form erupted after the porphyrite as is proved 

 by its intrusion into the porphyrite-tuff near Koang-jyu 

 (Chyöl-Ia-Do) ", and in series No. 2 at Ha-yang-^ near 

 Tai-ku (Kyöng-sang-Do). The grano-masanite irrupted 

 at the end of the Kyöng-sang period. 



VII. The Tertiary Formation 



At about the close of the Mesozoic era, or in our case the 

 Kyöng-sang period, a great diastrosphic movement occurred in 

 the peninsula, especially in south Korea, accompanied or ushered 

 in by the eruption of neogranite or masanite. The land was 

 dislocated and uplifted, depressed and remodelled, and the general 

 outline of the peninsula was then complete. Since then, as in 

 the case of China, the land of Korea has remained long in the 

 continental period, and has been degraded from Alpine altitudes 

 to hilly tracts, the materials from the ruined mountains forming 

 in the meantime the Tertiary deposits near the sea- shore, which 



1) Sea pages 74-75. 2) See page 91. 



