130 ART. 2.— B. KOTÔ: 



San range, caused the sinking of tlie inner, east side which cor- 

 responds to the down -warped region under question. 



We then proceeded from Siu-gol eastwards through the 

 gorge in which the scenery was fine. Though it was dusk and 

 we were hastening on along the course of the torrent of the 

 Nam-chlujon, we still noticed gneiss-granite. At about the middle 

 of the gorge, a dark sheared hornblende-granite resembling 

 " Flasergabbro " appeared followed soon by fine oi'thogneiss as far 

 as Kocm-bm^\ From the lithological character of the rock and the 

 direction of the shearing plane in it, I thought I was passing 

 the easternmost ridge of the So-jMik-san range in defile, corres- 

 ponding to Chhj'ông-mbri-chhl in the Second Traverse '^\ 



Having left the mountain- depression in which the village of 

 Kocm-hln is situated, we went eastward up the water-shed ■'"'-' (170 

 m) from which the land gradually sloped away toward the Nah- 

 tong-gang. The rock was still gneiss-granite stretching N. GO E., 

 with the dip N.W., instead of being vertical. This was the pre- 

 vailing orientation of the rock of this region. On the east side 

 of the pass gravel of an apparently contact rock, banded blue 

 and gray, was found in abundance. I saw it also in the distance 

 crowning the orthogneiss at the top of 0-to-san '\ If it proves 

 to be really a contact rock, the metamorphosing rock will be 

 the gneiss-granite. The whole state of things here is to me 

 entirely paradoxical. 



All the way the same gneiss-granite was exposed except at 

 Ha-yang where a gneiss -granite was seen for a short distance 

 with red porphyritic feldspar. It is probably a later intrusive. 



About 9 km from Koan-hin, a stream makes a sharp curve 



1) Ed ^ 2) See ante, page 85. 



3) Chrt-ri-chhi S M HiJ 4) E ê UJ 



