PLATE XVII. 



Fig. 1. — Tlie eastern side of tlie Clihyüiig-möii-chln pass (cfr. PL XVI. 

 fig. 3) is precipitous. One looks dowu upon the liilly lowland (70 

 111) of the Nak-tong-gang backed by a high ridge (faint in the 

 picture) of the eruptive Kyong-sang formation beyond the river. 

 The relief of the meridional Nak-toug lowland is of the coulisse 

 form with model-like regularity, all ridges running parallel to one 

 another in the direction of the axis of the basin. The pass on 

 which we stand is the eastern margin of the Chiri-san massive. 

 See page 85. 



rig. 2.— View of the Chhyöug-möri-chhi pass (cfr. PI. XVI. fig. 3, PL 

 XVII. fig. 1) from 8am-ga Avhich lies about 14 l-ni to the east. 

 The eumncd is at the right corner, and the neck in the left corner 

 in the distance is the pass just mentioned. The foothills are the 

 terrane of muscovite-sandstone of the Lower Kyöng-sang forma- 

 tion, (pp 85-86). 



Fig. 3. — Again another view of the Chhyöng-möri-chhi pass, this time from 

 the Tai-kok-chhi pass {-j^ ^ |l|,f), whicli lies 8 km in a northeast- 

 erly direction from Sam-ga. The low parallel meridional ridges 

 are all built up of the rocks of tlie Lower Kyöng-sang formation 

 which we saw from the opposite side at the top of the Chhyöng- 

 möri-chhi pass, fig. 1. See page 86. 



