GEOLOGY OF JAPAN 



65 



lu the Joban district, the Neogene consists of the Shiramizu 

 (Miocene), the Yunagaj^a (Miocene) and the Shirado (Pliocene) Series. 

 The lowest jmrt of the Shiramizu Series contains coal-seaias which 

 are now being extensively worked. The Neogene in the environs of 

 Sendai ranges from the M'ocene to the uppermost Pliocene. In the 

 meridional and western parts of Northern Honshu, the Neogene extends 

 from Shinano and Echigo on the southwest, through Uzen and Ugo, 

 to the northern end of Mutsu. Tlie older Neogene of this region 

 often contains coal-seams in its lower part, and the younger is often 

 petroliferous, constituting the greater jjart of the oil-lands of Echigo, 

 Akita and Aomori. The Neogene in Totomi and Suruga, usually 

 known as the Oigawa Tertiary, consists of the Lower and Upper. 



