14 ART. 2. — B. KOTO : 



The hill at the back of Fusaii (Fiisaii), on a spur of which 

 the Japanese settlement is located, is made up of the same rocks 

 as those of Deer Island. Here we find a poor, discontinuous 

 vein of magnetite, 5 to 10 cm thick, intergrown with quartz, 

 accompanied on both sides by selvages of skarn consisting 

 of epidote and actinolite-like hornblende. The vein strikes 

 regularly E. 20 S., wdth a north-easterly dip, and continues from 

 here through the Chinese settlement to the north-eastern shore 

 of Deer Island, in the same direction as the green bedded countr\^- 

 rocks. This epigenetic ore-body is probably the in-filling of a 

 strike-fault hading with tlie dip of the surrounding rocks. I 

 cannot say positively whether the formation of the ore has any- 

 thing to do with the up-welling of the granitic laccolith which 

 crops out along the coast, 2 hn northwards near the old fort of 

 Fusan-chin. 



Proceeding on our journey from Fnmii our way led north- 

 westwards up the pass of Kii-d'ôk-san '^ on the already-mentioned 

 complex of green tuffs and eruptive sheets, dipping slightly north- 

 eastwards, and followed the same rocks as far as the northern 

 foot of the pass where tlie said laccolith of granite reappears on 

 this side. Our route now joined the main road to Fiiscm, which 

 goes over the slight elevation of the Kam-kogai '' pass. Here 

 again we observe that the north side of the elevation is composed 

 of granite, while the south side exposes a granitic base capped 

 with green rocks. 



As may be seen on the geological maj), the granite -laccolith 

 forms an irregularly triangular area stretching along both banks 

 of the Nak-toncj-gang with its apex in the Fusan harbor, and with 



1) A fê m 2) -H- Èa 



