4 AKT. 8. H. YABE. 



Ill tliis formation, Gottsche distingiiislied five series of rockö 

 wliicli enumerated from below are as follows : 



1) Dark marly shale, alternating with a fine grained, fragile 

 sandstone. 



2) Bituminous clay, partly discoloured, with small coaly 

 Hecks and obscure vegetable impressions. 



3) Conglomerate, arcose near the base, with numerous, very 

 compact layers of the same rock. 



4) Marl of various grades of colour between violet and 

 chocolate-brown, with frequent intercalations of compact lime- 

 stones. 



5) Thick banded sandstone, conglomerate-like near the 

 base. 



The total thickness of these series of rocks is estimated by 

 Gottsche as more than 600m., i.e. 25 m. for the first; 15m. 

 for the second ; 450 m. for the third ; 70 m. for the fourth ; and 

 40 m. for the last series. 



According to the writer's view, the Kyöng-syang formation 

 is a much thicker complex, with frequent intercalations of red 

 tuffs and porphyrite sheets in the upper portion. The study of 

 many local profiles led him to recongnize by means of the pre- 

 dominating rocks the following four principal divisions of the 

 formation. The uppermost part is characterised by porphyrite 

 sheets and a green breccia associated with them. The next part 

 contains thick layers of several kinds of red coloured tuffs partly 

 brecciated, together with a greenish slaty rock. The third part 

 is mainly composed of a hard sandstone, often passing into a 

 conglomerate and usually underlaid by a thin shale, a red tuff 

 and an amygdaloid al sheet. The fourth part is composed of a 

 series of thick slates, green or black in colour and often sandy. 



