\\ OROGRAPHIC SKETCH OF KOREA [g 



similar in structure throwing down the right block directly to the 

 Level of the sea. The precipitous wall which we sec landwards from 

 the sen is the scarp of this easternmost fault. A bell ol block 

 interposed between the first and second ruptured planes often slants 

 steeply landwards. 



A third structural line is seen to run to the west and nearly parallel 

 to these two lines, this time throwing down the west wing, and this 

 movement creating the inland scarp-ridge. The Thai-Paik-san range 

 resulted literally, in the geological language, from step-faults, and 

 the whole stretch is a crust-block or Horst. I shall now trace the 

 maritime ridffe. 



The sea-board ridge starts by the name of Tong-tai-san n from 

 Yöm-pho 2) (Tikhmenef Point) near Ul-san :?) cove, which is an inlel of 

 the rias type. The coast between the harbour of Fusan and the cove 

 of Ul-san was 300 years ago the landing place of the Japanese army 

 under Hidéyoshi. The Tong-tai-san and its northern prolongation are 

 a tilted block uplifted on its east side, slanting westwards; and 

 remarkably granitic patches are seen between this and the median 

 ridge, presenting the characteristic form of granitic mountains wit Inn 

 an area of green rocks. The coastal ridge also marks the boundary 

 of light-coloured rhyolite and its derivative sedimentaries of the 

 Tertiary age. The shallow Xong-il 4) (Unkofsky Bay) is within this 

 o-eoloo-ical formation. The ridge then proceeds northwards through 

 Yöng-häi 6) , and Ul-chin G) . Sim-ni-kokai 7; and \olp-ehhi ai are the 

 passes leading to the inland plateau. 



The coastal escarpment goes on along shore through Ivang-uön 

 Do as far as Ko-syöng, where it is cut short at Chyang-chyön Bay 



7) -vm. 



