AN OROGRAPHIC SKETCH OF KOK I I 17 



high antiquity, they arc now reduced into stumped and well- 

 nigh subdued mountains. Therefore, they cannot be recognized 

 as ridges in a topography, though they still mark distinct water- 

 partings. 



b. THE KOREAN SYSTEM. 



Another element which I have already treated in part, is the 

 Korean System. This time the result of tectonic disturbance is not an 

 earth-fold, but the rupture and dislocation. As this system originated 

 at a somewhat later date than the preceding, probably post-Perm- 

 Triassic, it has had a great eifect upon the modern topography of not 

 only South Korea, but also the whole peninsula ; and not only on 

 land-forms, but also on coast lines. We have to distinguish several 

 members of somewhat diverse orientation in the system. I shall 

 speak at first of the most important of these members. 



a) The Thai-Päik-San Eange. 



i. Median Ridge. — From Ta-thai-pho point 1 } at the mouth of the 

 Nak-tong Gang 2) , a meridional ridge of green porphyrite and granite 

 with fault-scarp facing east, runs through Ön-yang 3) and Kyöng- 

 jyu 4) , Chhyöng-syong 5) and Yong-yang 6) , where the rocks are replaced 

 by alternating beds of green tuffs and red shales. In the last-named 

 district, the ridge intersects the No-ryöng range in granite-gneiss, and 

 culminates near the Sa-gil-lyöng 7) pass at the crescent-shaped, and 

 tree-covered Thai-Pàik-saiP of Paleozoic rocks (1,500 m.). The name 

 of this mountain is known to every Korean and is regarded with some 

 reverence, though the high peak itself presents to us no specially 



1) £*.\m- 2) &jRfl\ 3) gp§. 



4) At Chhyon^yon^-kokai CférUHlË) it lowers to 200 meters. 5) ^H£. 



6) m.m- 7) b>s& s) *fâm 



