Vol. XLIir., Alt. 5.— T. Katô : 



tin veins are abnndant throughout the world, and they are com- 

 monly found in sedimentary rocks more or less distant from igneous 

 rocks or ore-brinfrers.^) 



FiQ. 1. View of the village of Akénobé, as seen from south. 



The Akénobé mining district lies on the upper course of the 

 Akénobé-gawa, a tributary of the Hirotani Eiver, which joins tho 

 Maruyama River near the railway station of Yabu on the San'in 

 line. The village of Akénobé (Figs. 1, 4) is situated at the center 

 of the district, about 25 kilometers southwest of the station of 

 Yabu. It is also accessible from the station of Nii on the Bantan 

 line, about 18 km. east from the village. This district has 

 precipitous mountain ranges on three sides, viz., south, east and 

 west, while the Akénobé River runs towards the north and a 

 highway leads from Akénobé to the town of Oya and beyond 

 along the valley to Yôka and Yabu. It occupies geographically a 

 very disadvantageous position in Eastern Chûgoku. 



1) Rcfi^r :— H. G. Fergason and A. M. Bateraan, " Geologic fe^tares of tin deposits,' F.cars. 

 Geol., Vol. VII., I'M 2, pp. 209-262; J. T. Singewald, "S)m.e genetic rela'ioas ot tin deposits," 

 Ec3n. Geol., Vol. VU., 1912, pp. 2G3-279; W. H. Twelvetrees and L K. Ward, Bull. 8, Depart- 

 ment of Mines, Tasmania, 1910. 



