\\ OROGRAPHIC SKETCB OF KOREA 23 



The one. now ander consideration, is distributed in the middle 

 of the peninsula, and is usually designated the Syo-Pâik-san Bange. It 

 h.-is already been spoken of in connection with the No-ryong fold which 

 it cuts off, and farther north it seems in turn to have been intersected 

 by the Thai- Päik-san members. About the last point, I am in some 

 doubt, for, my route did not traverse the mountainous part of Sam- 

 chhyök on the east coast to Thai- Päik-san, nor to Chyöng-syön u over 

 the pass of Päik-pong-nyöng 2) . 



It was said that there the mountains were rough and ponies 

 could scarcely be employed at that time. Consequently my personal 

 knowledge unfortunately does not enable me to give details as to how 

 the Thai-and Syo-Päik-sans intersect each other, and as to which took 

 the active part. It is, however, likely that it is the latter that was 

 severed in its north-easterly course by the former. 



I do not even know whether the Syo- Päik-san in this region is 

 a fold-ridge, or a tilted edge of Paleozoic formation. Judging, how- 

 ever, from the structure seen at Tyo-ryöng 3) and I-hoa-ryöng 4) (520 

 meters) on the high w r ay between Seoul and Fusan, we shall probably 

 see at the junction the Syo-Päik-san in the first form. The pass of 

 Tai-chyung-nyong s) , 500 meters high, between Tan-yang 6) and 

 Phung-geui 7) exposes a granitic base capped by a Paleozoic bed of slate 

 and limestone dipping to the northwest, and shows the igneous rock 

 to be of a laccolitic nature. Syo-Päik-san in a narrow sense is really 

 the edge of this Paleozoic complex of the Chyung-nyöng pass. 



A large triangular area of granite, which the Koreans call the 

 Thai- Päik-san region, is situated at the inner angle of the Thai-and 

 Syo-Päik-sans. Analogous cases are frequently mentioned in geol- 



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