EUP 



120 ART 2. — B. KOTO: 



only different facies, and so have colored my map with separate 

 tints. 



/3) From Chyöng-eup to Chin-an 

 (See sketch map, p. 113.) 



In order to ascertain the extent of the " spatnlate area " in 

 my mipnblished map, Mr. Yabe mide a trip in the east-west 

 direction from Chi/öng-eup ^^ to Chin-cm''^ via Man-mal-koan^^ , 

 already referred to. 

 ^^^^^^ Having started eastwards from the lirst- mentioned eumnäi 



on the southern edge of the Chi/öng-Ji/ii plain, he travelled on 

 the granitic terrane. It is a grayisli, coarse, sheared granite with 

 rectangular feldspar (ortlioclase or microcline, lJ-2 C7n long). 

 Yabe crossed the Simchhyang-Chyöngji/u highroad (meridional) at 

 Yöm-am*^ ^YheYe the orthogneiss comes in contact with several 

 of the basal members of the Upper Kyöng-sang formation. One 

 I'ock is (1) a dark-gray, calcareous diabase-aphanite, containing 

 microphenocrysts of chloritized diopside, associated with red, 

 calcareous marP'. At Yöm-ani, a stream is fall of (2) ortho- 

 gneiss gravel, but a pass toward Chln-an is already of the young 

 formation built up of (3) white, silicified spheruhte-rock, (4) dull- 

 white, devitrified perlite, (5) dark, flinty diabase-aphanite, micros- 

 copically similar to No. 1., and (6) ash-gray, amygdaloidal 

 diabase. These various effusives dip W.N.W., and are overlaid 

 or underlaid as far as Man-mal-koan '"'^ by a complex of dark 

 marl"^ and sandstone, the former having imperfect plant impres- 

 sions, and the strike N. 30° E., with the dip at first to the N.W., 



1) * Q 2) Wi ^ 3) See page 114. 



^) ^ -^ ^) At Song-hoang-dong (^ P^ ^). G) See Yabé's trip, page 114. 



7) Not far from this locality gold is -washed from the soil directly overlying the marl. 



