JOUENEYS THROUGH KOREA. Kjl 



and dip, tliough finally dipping in the contrary direction at the 

 contact with the orthogneiss base of the northwest wing of the 

 syncline. The prevalent rocks are the wliite sericitic leaf-gneiss 

 (Lagengneiss), and epidote-hornblende-gneiss witli stretched struc- 

 ture. The latter was originally an injected apophysis slieared 

 subsequently to its present form. According to the laccolith 

 theory, both rocks would be the products of the marginal consolida- 

 tion of a certain magma. 



III. d. The Kun-san Complex. Tlie small area on tlie 

 southwest of the port of Kun-san is the fourth and the outer- 

 most belt of the Phyllite Series ^\ Mr. Tnouye '^ includes the 

 series of rocks botli on the west and also on the east of Kun-san 

 in one group under the name of the " Kun-san Formation." I 

 leave the series of rocks which occurs from the east of Kun-san 

 to Ham-y'ôl at present to treat it on another occasion along with 

 the eruptive formation of granite. 



The small group of the Phyllite Series near the roadstead 

 of Kun-san has in its lowest bed (1) a pliyllitic sericite- schist 

 with the strike N. 30 E., and the dip slightly west or vertical, 

 well exposed at the landing place. Next in ascending order 

 comes (2) a bluish, compact ottrelite-biotite- schist'^ with the ap- 

 pearance of an amphibole -schist. It is an altered product of a 

 clayey sandstone. Then (3) a coarse, colorless quartzite which 

 is a dyke or normal member, overlaid by (4) a Garben s chief er 

 with stripe-flecks, which gradually passes into (5) the greenish- 

 silky normal phyllite. Tlie present series is similar in rocks 

 to that already mentioned under III. a, h, c, with the difference 



1) See page 108. 



•2) 3Iem. Imp. Geol. Surv. Japan. Vol. I. No. 1. 1907, Tokyo, p. 20. 



3) Another occurrence of ottrelite rock is at Tong-pok, p. 69. 



