Mesozoic 



118 ART 2. — B. KOTO: 



along the strike of the Mesozoic metamorphics, first meeting with 

 the same breccia formation with the strike N.N.W. and the dip 

 N.E. — a part of the breccia region, described somewhat in detail ^^ 

 in tlie Second Traverse. Further onwards he found a gray, 

 banded, non-fossiliferous, crystalline limestone, white quartzite, 

 reddish sericite-quartz-schist with parallel-planed cleavage (the 

 metamorphic Mesozoic), and red felsophyre at Ol-clihi"^ where a 

 reddish gneiss -granite again made its appearance. The limestone 

 contains microscopic patches of sericite and grains of quartz. 

 About 7 hn this side of Chijang-song on the east side of the flat. 

 Prof. C. Gottsche'-^ found another limestone (Ssari-chhi*^) with 

 garnet and vesuvianite. It is undoubtedly one of the Mesozoic 

 members. 



Chtang 



Sn^Lr- Chyang-smg has been known to geologists since the journey 



made thither by Gottsche in 1883. According to him^^ there occur 

 at U-dong "^ between gneiss and porphyry-tuff the following beds : 



1. Fine -granular sandstone, 10 on ; 



2. Dark marly- slate with gastropoda, ostraeoda and 

 plant-remains, 3 m ; 



3. Medium-granular conglomerate, 20 m. 

 As the strike of the complex corresponds with those of Nak-tong, 

 Ulsan, and Ko-sbng (Kyöng-sang-Do), it is provisorily included by 

 him in the Paleozoic. 



In Mr. Yabe's collection, the district from the north of Chjang- 

 song to Chhgöng-am''^ is represented by the following rocks: (1) 

 Light-reddish felsophyre, and (2) fine masanite. From the latter 



1) See page 72. 2) ^^j- tj 



3) " Geologische Skizze von Korea." Sitzungsber. d. Akatl. d. Wiss. zu Berlin, XXX. 1 886, 

 S. 864. 



4) a JiJ 5) Loc. cit. S. 868. 

 6) ^ j0 7) ^ j^ A few kilometers north of Chyang-söng. 



