IGO ART. 2. — B. koto: 



folsopliyre on the east and underlaid by orthogneiss on the north- 

 west. 



The belt of tlie JIu-an schist trends southwest with the up- 

 lifted edge on the gneiss terrane, and some of the island groups 

 ofT MoJi-pho may be inferred with great probabihty to be prolonga- 

 tions of this belt. Its northeastward extension was recon- 

 noitered by Mr. Niiyama (p. 117), who found a hard sericite- 

 (jiiartzite underlying the schist at Ham-phyöng . Mr. Yabe '^ followed 

 the belt as far as Chi/couj-xoug along the strike of the complex, 

 finding on the way wliite (^uartzite and reddish sericite-quartz- 

 schist, and, as on the south of Ok-hoa, a crystalline limestone. 



TIL ('. The Chyön-jyu"^ Complex. This is a syncline 

 lielt whose axis trends from the northeast to the southwest. 

 The basement of the southeast wing is an alkaline orthogneiss 

 overlaid by (1) a biotite-schist of clastic origin with parallel-plane 

 structure, and (2) a grayish, lustrous graphite- schist with fine 

 dots of quartz grains, and (3) a nephrite-tremolite-schist. Mr. 

 Inouyk ''^ found at the gold mine in Keum-fju, not far from here, 

 a similar rock which, liowever, contains malacolite instead of 

 tremolite. Both the tremolite and malacolite rocks seem to 

 have been altered from an impure limestone. Then comes 

 (4) a yellowish, psammitic quartz-schist. Lastly, the uppermost 

 bed (5) is a phyllitic sericite-schist with spots of graphite. These 

 multifarious schists are well exposed, with the strike N. 60° E., 

 and the dip 75 N.W., at the old citadel, Nam-lv San-song, of 

 Chyon-jyu. 



On the west of the town, members of the same complex, 

 but of different characters, are exposed keeping the same strike 



1) See sketch map, images 113 axiil 117. 2) ^ >y[\ See page 115. 3) See p. 115. 



