JOURNEYS TIIEOUGH KOIŒA. 83 



granular consisting of hornblende, biotite, plagioclase, and titanite, 

 witli the habit of the components common in crystalline schists. 

 Both are sheared in the direction N. 30 E. inclining southwards. 

 Tliey seem to me to be composite dykes of great magnitude. 



Throughout the tract between Nam-ubn and Ham-yang, mul- 

 tifarious modifications of a granitic magma are all sheared in 

 the direction N. 70° E., /. <?,, in the Pam-chhl ridge direction con- 

 forming to the Han- sa n system wh ici i characterizes the disloca- 

 tion of southern Korea. Taking into consideration firstly, the 

 abundance of later intrusions in the form of dykes in the same 

 orientation, especially ou the stretch from Sa-keun to San- 

 chhißng, and secondly, the geographical situation of the dykes, 

 corresponding to the cross section of the axis of the Pam-chhl, — 

 we are convinced of the fact that the tectonic disturbance ex- 

 pressed in the dislodgement of the crust in the equatorial Pam- 

 chhi orientation has a deep siLTuificance, obliquely cuttiu"; as it ^^^ han-san 



■'■ ^ ' 1 J o Orientation 



does the prevailing tectonic direction of Chyöl-Ia-Do. How far 

 this deformation influenced the other parts of Kyöng-sang-Do, 

 and in what age the disturbance occurred are all important 

 questions which will be discussed in later pages. 



At the hill -neck between Säing-nini-jyang ^^ and Chäeü-gori'^, 

 we came suddenly upon a new rock, which resembles a coarse 

 marble in its external appearance, structure, and colour. Macro- 

 scopically, some specimens show, however, faint indications of 

 schistosity in the linear arrangement of the chloritized horn- 

 blende. Under the microscope, it was found to consist of a 

 hypidiomorphic- granular aggregate of highly poly synthetic plagio- 

 clase. Hornblende and muscovite, both chloritized, are found in 



1) & 1* 1^ tS 2) 8E ^ M 



