JOURNEYS THROUGH KOREA. 69 



microcline. Then the pass of Tok-chhi '^ was reached where a 

 typical greenish ottrelite-^\\y\Y\iQ and hematite-schist witli ottrehte 

 were seen intercalated with a coarse, crushed rock of qnartzose 

 nature and of light color wliich had as accessories tourmaline and 

 a violet-brown, highly refractive and doulilo-refractive mineral 

 (zircon ?). It is probably the- northern prolongation of the graphi- 

 toid bed of Kul-am already referred to. The same formation was 

 constantly observed, sometimes covered with a conglomerate 

 consisting of cobbles of grayish, crystalline limestone ''\ as far as 

 the next hill-pass (14 Im from Tong-poh), — a watershed of the 

 branches of the Smn-jln-gang river. From the said hill-pass to 

 Ok-hoa was seen a psammitic nuiscovite-schist which represents 

 the northeastern extension of tlie belt of the same schist of Kmig-jhi 

 and Neung-jyu "\ 



From Ok-koa to Tari-möri was seen a biotite- schist which had 

 resulted from the granulation and compression of a granite rich 

 in biotite, containing tourmaline as an accessory. Then a rather 

 high, equatorial ridge was passed over to the eye-gneiss flat of 

 Sun-chhjang *\ The ridge of this Thong -mijong-san is built up of 

 the same psammitic muscovite- schist as that of Ok-koa, but how 

 the two are connected tectonically I am not able to say. I shall 

 touch Sun-chhycmg again in my second traverse. 



1) îS ii# 



2) A slide was made of it and examined with the lioi)e of fixing the age of the complex, 

 but not a trace of organic remains was discovered. 



3) See ante, i)p. 50 (footnote 3) and 55. 



4) if g See page 76. 



