öO AllT. 5. — 11. YA13E. 



in the peninsula ; FukiTchIj in a report (in Japanese) of the 

 coal-survey, briefly refers to the geology of the district as 

 follows : 



" Near Phyong-yang, there are three different rock series 

 exposed:— (1) the Palaeozoic composed of slate and limestone, 



(2) the Phyong-yang series consisting of three parts, the upper 

 composed of sandstones, the middle of alternations of sandstones 

 and of at least three coal seams and the lower of shales, and 



(3) alluvial along the Tai-dong-gang. At three spots (one near 

 Mun-syu-bong'^ and two at Mu-no-san-^j a limestone with Fusulina 

 was seen beneath the lower shale of the Phyong-yang series, 

 but the exact relation between them is unknown." 



In one of his reports, Mr. T. Iki''^ also gives the similar 

 result of his observation on this coal bearing series ; he could 

 not, as I am informed, make out a distinct stratigraphical break 

 between the shale with the coal-seams and the same with the 

 limestone-lenses. Besides, there is another series of sandstone 

 exposed at the north of the Tai-dong-gang near Phyongyang 

 which often contains imperfect impressions of plants and sometimes 

 makes an approach to a conglomerate, with numerous inclusions 

 of pebbles. The latter he doubtfully referred to mesozoic. 



Although it is impossible at present to correlate the respec- 

 tive layers of the profile made by Gottsche with those of the 

 one made by Iki and Fukuchi, this much is certain, that the 

 so-called Tertiary of the former corresponds, at least partly, to 

 the coal-bearing series of the latter ; for Gottsche had pointed 

 out the occurrence of his Tertiary (?) deposit also at a place lö 

 Korean li (=6 km.) south of Phyong-yang, where there are no 



1) 3^7K_^ (Ml. Mun-syu). '2) J^EUl (Mt. Mu-no). 



Ö) Jcurn. Geol. Sec. TôkyG. Yd. Xill-, p. 17;;. 11)U() (in Japautse). 



