JOUENEYS THROUGH KOREA. 171 



of the classifications advanced by several writers in the Kyöng- 

 sang formation (see the table). 



First of all it should be noted that tliere is a discrepancy 

 regarding the uppermost member (No. 1 of the last column). 

 Messrs. Gottsche and Inouye look at the green porphyrite and 

 its derivative fusion-breccia simply as products of later volcanic 

 eruptions, while Mr. Yabk and myself like the rest take it as 

 forming a geological unit. More extended researches will 

 decide the question. It is, however, to be remarked that Nos. 

 2 and 3 are built up of volcanic materials sorted and deposited 

 under shallow water, and are intimately related to No. 1 — the 

 eruptive sheet. These eruptive formations lie everywhere con- 

 formably upon the normal elastics. Nos. 4 and 5, though a con- 

 glomeratic bed is sometimes inserted between Nos. 3 and 4. 

 Consequently the whole forms an uninterrupted series of rocks 

 corresponding to a long range of Mesozoic time. Green porphy- 

 rite and its breccia occur alwaj^s in association with the Meso- 

 zoic in southern Korea. 



To speak more in detail of the beds in the above scheme, 

 the lowest, No. 5, is mainly built up of muscovite- sandstone with 

 intercalation of micaceous marl. The region composed of the 

 beds consists of rolling hills with " hogbacks " whose trend cor- 

 responds to the tilted edge of slowly inclining, reddish-weather- 

 ing strata. The general features of the land and rocks remind 

 one of the " Red Basin of Ssï-chuan " of the Upper Yang-tse- 

 kiang, if tliey are not of the same geological age. In this horizon, 

 Mr. Yabe ^^ found the plant-bearing bed at Pidtang-kokäi in North 

 Kyöng-sang-Do (p. 36). I give in the following the constitution 

 of this small flora. 



1) Loc. cit. p. 170. 



