36 AET 2. — B. KOTO : 



river at Ka-hti-gol ^-* from the sandstone hill-neck of Ka-kui-bahoi, 

 we had for the first time in full view towards the west the cele- 

 brated, high massive of the Chiri-sun "^ (1842 m), which lies at the 

 boundary of Kyöng-sang-Do and Chybl-la-Do, trending N. 40'' E. in 

 conformity with the general strike of tlie topographic lineaments 

 of South Korea. The Chiri-san consists of two ridges. The front 

 one soon ends in the north, sending off a branch eastwards to 

 the north of Chin-jyu, while the other, higher one '\ behind it runs 

 to Ha-dong *' and still farther southwards. We took a short rest 

 oan-sa at Oan-sa^\ which is located in a fiat within a hilly district of 

 the same geologic formation, consisting of a gray, muscovite- 

 bearing marl with a few traces of unidentified plant-remains, 

 alternating with reddish muscovite- sandstone (the dip 10 E.). This 

 is the geological horizon which corresponds to the plant-bearing 

 bed of Pultang-h'okäi^^ east of Sang-jyii in North Kyöng-sang-Do, 

 where Mr. Yabe was fortunate enough to find tolerably rich remains 

 of plants of the type of the Tetori series of Japan. He calls the bed 

 the Nak-tong series which, according to him, represents tlie Dogger- 

 Mahn epoch in Korea "-*. I shall return to this point later on. Mr. 

 K. Inouye afterwards found the same plant-bearing bed at the 

 north of liydp-cJihydn^^. The above-mentioned localities lie in the 

 northern prolongation of the exposure at Oan-sa, at distances of 

 50 and 150 km, respectively. 



1) M fl^ m 



2) The Pang-jyang-l>ong range (3^ 5t S!^) wliirli culminâtes .it the highest point of the 

 Chiri-san (1942 m). 



4) m ?SI 



5) Mr. Inoiiyé followeil the road liither from Sii-chhyün on the coast, on the wet-gray com- 

 plex of shale (marl) and sandstone, weathering into red earth, as far as 4 km that side of 

 Oan-sa. His side-trip was of importance in fixing the limit of the said V)eds which we had 

 passed over in Chin-jyn. 



^') {% Si m 7) H. Yabé : " Mcsozoic liants from Korea." This Journal, Vol. xx, Article 

 8, 1905. H) ^ in 9) m, i^ 



