THlî GREAT ERUPTION OF SAKURA-JIMA IN 1914. 

 F"ig. 1. — (îeotectonic Slnp of S.W. Jilp.'^n. 



^ "" ^ .r %"^ifi/ 



C^ I 



l \^^ —— -^ /i:s' \ \ »30' 



^^^^ SamboßeiwcL-MikaLn. Series CSchists) \^2^^_\ Piî^-Tunrj-hai Thiptiwc-LiixC' 



l^y "1 RyùhyvL Volcanic Chain. V'^\ Voltuxnic CJtain of Hot-nh- c^^iAciitR^ 



The writer may add the third member to the homologue, and that is the region iinder 

 discussion. Indeed, the shallow Tung-hai is a submarine j)lateaii bounded on the southeast by a 

 scarp — the cordillera of Eyûkyû, "which is also constructed of Paleozoic and green schists. This 

 elevated zone makes the inner edge of the Ryùkyû fore-deep (700 m.) which separates the fore- 

 land of the South Japan Sea, sometimes called Philippine Bay or ]\Iariana Sea — the siibmarine 

 l^lateau of 400 m. enclosed by a large sweeping volcanic chain of the Bonin, Mariana and Palan 

 islands. Earthquakes are frequent in the fore-deeps of the Himalaya, the Yixnnan-Burma frontier 

 and Eyûkyû. The volcanic chain of Byûkyù is represented in Ujiper Burma by sporadic 

 occurrences of volcanoes in the Teng-yueh (|§ '^) area. We have hitherto failed to find 

 recent volcanoes at the foot of the Himalayas, although Hedin records their occurrence in the 

 inner Tibetan plateau. .SVe C. Bro^^^l, Benord Geol. Sur v. India, Vol. XMII. Part 3, 1913. 



